123 (number)

123 (one hundred [and] twenty-three) is the natural number following 122 and preceding 124.

← 122 123 124 →
← 120 121 122 123 124 125 126 127 128 129 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred twenty-three
Ordinal	123rd (one hundred twenty-third)
Factorization	3 × 41
Divisors	1, 3, 41, 123
Greek numeral	ΡΚΓ´
Roman numeral	CXXIII, cxxiii
Binary	11110112
Ternary	111203
Senary	3236
Octal	1738
Duodecimal	A312
Hexadecimal	7B16

In mathematics

• 123 is a Lucas number.^[1] It is the eleventh member of the Mian–Chowla sequence.^[2]
• Along with 6, 123 is one of only two positive integers that is simultaneously two more than a perfect square and two less than a perfect cube (123 = 11² + 2 = 5³ - 2).^[3]
• 123 is the first whole number containing numbers from 1 to 3.

In religion

In numerology, the sequence of 123 is associated with progress and the Holy Trinity, so it may be referred to as the Trinity of Progress or Triad of Progress.^[4]