number.wiki
Number

120

120 is a composite number, even, a calendar year.

Abundant Number Factorial Harshad / Niven Hexagonal Tetrahedral Triangular Year

Properties

Parity
Even
Digit count
3
Digit sum
3
Digital root
3
Palindrome
No
Divisor count
16
σ(n) — sum of divisors
360

Primality

Prime factorization: 2 3 × 3 × 5

Divisors & multiples

All divisors (16)
1 · 2 · 3 · 4 · 5 · 6 · 8 · 10 · 12 · 15 · 20 · 24 · 30 · 40 · 60 · 120
Aliquot sum (sum of proper divisors): 240
Factor pairs (a × b = 120)
1 × 120
2 × 60
3 × 40
4 × 30
5 × 24
6 × 20
8 × 15
10 × 12
First multiples
120 · 240 · 360 · 480 · 600 · 720 · 840 · 960 · 1,080 · 1,200

Representations

In words
one hundred twenty
Ordinal
120th
Roman numeral
CXX
Binary
1111000
Octal
170
Hexadecimal
78

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 120, here are decompositions:

  • 7 + 113 = 120
  • 11 + 109 = 120
  • 13 + 107 = 120
  • 17 + 103 = 120
  • 19 + 101 = 120
  • 23 + 97 = 120
  • 31 + 89 = 120
  • 37 + 83 = 120

Showing the first eight; more decompositions exist.

ASCII character

As an ASCII codepoint, 120 is x. Printable ASCII character x.

Hex color
#000078
RGB(0, 0, 120)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.120.