Number
1,222
1,222 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 7
- Digital root
- 7
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,016
Primality
Prime factorization: 2 × 13 × 47
Divisors & multiples
Aliquot sum (sum of proper divisors):
794
First multiples
Representations
- In words
- one thousand two hundred twenty-two
- Ordinal
- 1222nd
- Roman numeral
- MCCXXII
- Binary
- 10011000110
- Octal
- 2306
- Hexadecimal
- 4C6
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1222, here are decompositions:
- 5 + 1217 = 1222
- 29 + 1193 = 1222
- 41 + 1181 = 1222
- 59 + 1163 = 1222
- 71 + 1151 = 1222
- 113 + 1109 = 1222
- 131 + 1091 = 1222
- 173 + 1049 = 1222
Showing the first eight; more decompositions exist.
Unicode codepoint
ӆ
U+04C6
Lowercase letter (Ll)
UTF-8 encoding: D3 86 (2 bytes).
Hex color
#0004C6
RGB(0, 4, 198)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.198.