123 (number)

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← 122 123 124 →
Cardinalone hundred twenty-three
Ordinal123rd
(one hundred twenty-third)
Factorization3 × 41
Divisors1, 3, 41, 123
Greek numeralΡΚΓ´
Roman numeralCXXIII
Binary11110112
Ternary111203
Quaternary13234
Quinary4435
Senary3236
Octal1738
DuodecimalA312
Hexadecimal7B16
Vigesimal6320
Base 363F36

123 is the natural number after 122 and before 124 and is a Lucas number. It is divisible by 1, 3, 41, and 123. It is the emergency telephone number in Colombia.