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1

Number 1 (one) is an odd digit prime number and natural number following 0 and preceding 2.

Properties of the number 1

Nominal1
Cardinalone
Ordinal1st
Number of digits1
Sum of digits1
Product of digits1
Number parityOdd
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Prime Factorization of 1

Prime factorization
Prime factors
Number of distinct prime factors ω(n)0
Total number of prime factors Ω(n)0
Sum of prime factors0
Product of prime factors1
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Divisors of 1

List of proper divisors 1
List of all dividers1, 1
Number of divisors d(n)2
Sum of all divisors σ(n)2
Aliquot sum 1
1 is a perfect number, since it is equal to the sum of its proper divisors.
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Prime numbers

Is 1 a prime number?Yes
Is 1 a semiprime number?No
Is 1 a Chen prime number?No
Is 1 a Mersenne prime number?No
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Sequences

Is 1 a Catalan number?Yes: C0, C1
Is 1 a Fibonacci number?Yes
Is 1 a Idoneal number?Yes: I0
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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.
1 is a Happy number
1 is a Humble number
1 is a Münchhausen number
1 is not a Perfect number
1 is a Perfect square
1 is a Palindrome
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Numeric Bases of 1

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
2Binary12
3Ternary13
4Quaternary14
5Quinary15
6Senary16
7Septenary17
8Octal18
9Nonary19
10Decimal1
12Duodecimal112
16Hexadecimal116
20Vigesimal120
36Base36136
60Sexagesimal160
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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 1 (n2)1
Cube of 1 (n3)1
Square root of 11
Natural Logarithm (ln) of 10
Decimal Logarithm (log) of 10
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 10.8414709848079
Cosecant of 11.1883951057781
Cosine of 10.54030230586814
Secant of 11.8508157176809
Tangent of 11.5574077246549
Cotangent of 10.64209261593433
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Number parity

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

Is 1 an Even Number?

No

Is 1 an Odd Number?

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

How to write 1 in other number systems?
Bengali numerals
Eastern Arabic numerals١
Hieroglyphs numeralsused in Ancient Egypt𓏺
Khmer numerals
Japanese numerals
Roman numeralsI
Thai numerals
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Translation

How do you say 1 in 38 different languages?
Arabicواحد
Croatianjedan
Czechjeden
Danish en
Dutchéén
Estonianɖeka
Faroeseein
Filipinoisá
Finnishyksi
Frenchun
Greekένα
Germaneins
Hebrewאחת
Hindiएक
Hungarianegy
Icelandiceinn
Indonesiansatu
Italianuno
Japanese
Korean
Latvianviens
Lithuanianvienas
Norwegianén
Persianیک
Polishjeden
Portugueseum
Romanianunu
Russianодин
Serbianједан
Slovakjeden
Sloveneena
Spanish uno
Swahilimoja
Swedishen
Thaiหนึ่ง
Turkishbir
Ukrainianодин
Vietnamesemột
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Miscellaneous

Number 1 reversed1
ASCII Code1
Unicode CharacterU+0001
Unix TimestampThu, 01 Jan 1970 00:00:01 +0000
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