Number
12
12 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 2
- Digit sum
- 3
- Digital root
- 3
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 28
Primality
Prime factorization: 2 2 × 3
Divisors & multiples
Aliquot sum (sum of proper divisors):
16
Representations
- In words
- twelve
- Ordinal
- 12th
- Roman numeral
- XII
- Binary
- 1100
- Octal
- 14
- Hexadecimal
- C
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 12, here are decompositions:
- 5 + 7 = 12
ASCII character
As an ASCII codepoint, 12 is FF (form feed). ASCII control character.
Hex color
#00000C
RGB(0, 0, 12)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.12.