Number
1,242
1,242 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 9
- Digital root
- 9
- Palindrome
- No
- Divisor count
- 16
- σ(n) — sum of divisors
- 2,880
Primality
Prime factorization: 2 × 3 3 × 23
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,638
First multiples
Representations
- In words
- one thousand two hundred forty-two
- Ordinal
- 1242nd
- Roman numeral
- MCCXLII
- Binary
- 10011011010
- Octal
- 2332
- Hexadecimal
- 4DA
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1242, here are decompositions:
- 5 + 1237 = 1242
- 11 + 1231 = 1242
- 13 + 1229 = 1242
- 19 + 1223 = 1242
- 29 + 1213 = 1242
- 41 + 1201 = 1242
- 61 + 1181 = 1242
- 71 + 1171 = 1242
Showing the first eight; more decompositions exist.
Unicode codepoint
Ӛ
U+04DA
Uppercase letter (Lu)
UTF-8 encoding: D3 9A (2 bytes).
Hex color
#0004DA
RGB(0, 4, 218)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.218.