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# 25

Number 25 (twenty-five) is an odd two-digits composite number and natural number following 24 and preceding 26.

## Properties of the number 25

 Nominal 25 Cardinal twenty-five Ordinal 25th Number of digits 2 Sum of digits 7 Product of digits 10 Number parity Odd
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## Prime Factorization of 25

 Prime factorization 5 x 5 Prime factorization in exponent form 52 Prime factors 5 Number of distinct prime factors ω(n) 1 Total number of prime factors Ω(n) 2 Sum of prime factors 5 Product of prime factors 5
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## Divisors of 25

 List of proper divisors 1, 5 List of all dividers 1, 5, 25 Number of divisors d(n) 3 Sum of all divisors σ(n) 31 Aliquot sum 6 25 is a deficient number , since it is larger than the sum of its proper divisors (6). Its deficiency is 19.
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## Prime numbers

 Is 25 a prime number? No Is 25 a semiprime number? Yes Is 25 a Chen prime number? No Is 25 a Mersenne prime number? No
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## Sequences

 Is 25 a Catalan number? No Is 25 a Fibonacci number? No Is 25 a Idoneal number? Yes: I18
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 25 is not a Happy number 25 is a Humble number 25 is not a Münchhausen number 25 is not a Perfect number 25 is a Perfect square 25 is not a Palindrome
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## Numeric Bases of 25

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary110012
3Ternary2213
4Quaternary1214
5Quinary1005
6Senary416
7Septenary347
8Octal318
9Nonary279
10Decimal25
12Duodecimal2112
20Vigesimal1520
36Base36p36
60SexagesimalP60
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 25 (n2) 625 Cube of 25 (n3) 15625 Square root of 25 5 Natural Logarithm (ln) of 25 3.21888 Decimal Logarithm (log) of 25 1.39794
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 25 -0.132352 Cosecant of 25 -7.55562 Cosine of 25 0.991203 Secant of 25 1.00888 Tangent of 25 -0.133526 Cotangent of 25 -7.48916
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## Number parity

Parity is the property of an integer of whether it is even or odd.

No

### Is 25 an Odd Number?

Yes, the number 25 is an odd number.
Total number of all odd numbers from 1 to 25 is 13
Sum of all the odd numbers from 1 to 25 are 169
The sum of all odd numbers is a perfect square: 169 = 13
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 25 in words is "twenty-five", meaning that: 25 is an aban number (a number without the letter a) 25 is not an eban number (as it contains the letter e) 25 is not an iban number (as it contains the letter i) 25 is an oban number (a number without the letter o) 25 is not a tban number (as it contains the letter t) 25 is an uban number (a number without the letter u)
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## Numeral systems

How to write 25 in other number systems?
 Bengali numerals ২৫ Eastern Arabic numerals ٢٥ Hieroglyphs numeralsused in Ancient Egypt 𓎇𓏾 Khmer numerals ២៥ Japanese numerals 二十五 Roman numerals XXV Thai numerals ๒๕
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## Translation

How do you say 25 in 38 different languages?
 Arabic خمسة و عشرون Croatian dvadeset i pet Czech dvacet pět Danish fem og tyve Dutch vijfentwintig Estonian blaeve vɔ atɔ̃ Faroese tjúgo­fimm Filipino dalawáng pû’t limá Finnish kaksi­kymmentä­viisi French vingt-cinq Greek είκοσι πέντε German fünf­und­zwanzig Hebrew עשרים וחמש Hindi पच्चीस Hungarian huszon­öt Icelandic tuttugu og fimm Indonesian dua puluh lima Italian venticinque Japanese 二十五 Korean 이십오 Latvian divdesmit pieci Lithuanian dvidešimt penki Norwegian tjue­fem Persian بیست و پنج Polish dwadzieścia pięć Portuguese vinte e cinco Romanian douăzeci şi cinci Russian двадцать пять Serbian двадесет и пет Slovak dvadsať­päť Slovene dvaset pet Spanish veinticinco Swahili ishirini na tano Swedish tjugofem Thai ยี่​สิบ​ห้า Turkish yirmi beş Ukrainian двадцять пʼять Vietnamese hai mươi lăm
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## Miscellaneous

 Number 25 reversed 52 ASCII Code 25  Unicode Character U+0019  Unix Timestamp Thu, 01 Jan 1970 00:00:25 +0000
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