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Number 71 (seventy-one) is an odd two-digits prime number and natural number following 70 and preceding 72.

Properties of the number 71

Number of digits2
Sum of digits8
Product of digits7
Number parityOdd
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Prime Factorization of 71

Prime factorization71
Prime factors71
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)1
Sum of prime factors71
Product of prime factors71
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Divisors of 71

List of proper divisors 1
List of all dividers1, 71
Number of divisors d(n)2
Sum of all divisors σ(n)72
Aliquot sum 1
71 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 70.
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Prime numbers

Is 71 a prime number?Yes
Is 71 a semiprime number?No
Is 71 a Chen prime number?Yes
Is 71 a Mersenne prime number?No
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Is 71 a Catalan number?No
Is 71 a Fibonacci number?No
Is 71 a Idoneal number?No
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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.
71 is not a Happy number
71 is not a Humble number
71 is not a Münchhausen number
71 is not a Perfect number
71 is not a Perfect square
71 is not a Palindrome
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Numeric Bases of 71

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.
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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 71 (n2)5041
Cube of 71 (n3)357911
Square root of 718.4261497731764
Natural Logarithm (ln) of 714.2626798770413
Decimal Logarithm (log) of 711.8512583487191
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 710.95105465325437
Cosecant of 711.0514642839695
Cosine of 71-0.30902272816607
Secant of 71-3.2360079335737
Tangent of 71-3.0776204031934
Cotangent of 71-0.32492636160145
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Number parity

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

Is 71 an Even Number?


Is 71 an Odd Number?

Yes, the number 71 is an odd number.
Total number of all odd numbers from 1 to 71 is 36
Sum of all the odd numbers from 1 to 71 are 1296
The sum of all odd numbers is a perfect square: 1296 = 36
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 71 in words is "seventy-one", meaning that:
71 is an aban number (a number without the letter a)
71 is not an eban number (as it contains the letter e)
71 is an iban number (a number without the letter i)
71 is not an oban number (as it contains the letter o)
71 is not a tban number (as it contains the letter t)
71 is an uban number (a number without the letter u)
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Numeral systems

How to write 71 in other number systems?
Bengali numerals৭১
Eastern Arabic numerals٧١
Hieroglyphs numeralsused in Ancient Egypt𓎌𓏺
Khmer numerals៧១
Japanese numerals七十一
Roman numeralsLXXI
Thai numerals๗๑
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How do you say 71 in 38 different languages?
Arabicواحد و سبعون
Croatiansedamdeset i jedan
Czechsedmdesát jeden
Danish en og halvfjerds
Estonianblaadre vɔ ɖekɛ
Filipinopitóng pû’t isá
Frenchsoixante et onze
Greekεβδομήντα ένα
Hebrewשבעים ואחת
Icelandicsjötíu og einn
Indonesiantujuh puluh satu
Latvianseptiņdesmit viens
Lithuanianseptyniasdešimt vienas
Persianهفتاد و یک
Polishsiedemdziesiąt jeden
Portuguesesetenta e um
Romanianşaptezeci şi unu
Russianсемьдесят один
Serbianседамдесет и један
Slovenesedemdeset ena
Spanish setenta y uno
Swahilisabini na moja
Turkishyetmiş bir
Ukrainianсімдесят один
Vietnamesebảy mươi mốt
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Number 71 reversed17
Unicode CharacterU+0047G
Unix TimestampThu, 01 Jan 1970 00:01:11 +0000
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