Number
123
123 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 6
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 168
Primality
Prime factorization: 3 × 41
Divisors & multiples
Aliquot sum (sum of proper divisors):
45
Representations
- In words
- one hundred twenty-three
- Ordinal
- 123rd
- Roman numeral
- CXXIII
- Binary
- 1111011
- Octal
- 173
- Hexadecimal
- 7B
Also seen as
ASCII character
As an ASCII codepoint, 123 is {. Printable ASCII character {.
Network port
TCP/UDP port 123 is the well-known port for NTP — Network Time Protocol.
Hex color
#00007B
RGB(0, 0, 123)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.123.
Possible US bank routing number
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Routing number
000000123
Federal Reserve
United States Government
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.