Number Gossip

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Unique Properties of 120

  • 120 is the smallest 3-perfect number — the sum of its divisors is equal to itself times 3
  • 120 is the smallest number to appear 6 times in Pascal's triangle
  • The internal angles of a regular hexagon are all 120 degrees
  • 120 is the number of 1-piece positions at checkers
  • 120 is the smallest triangular number whose digit permutations yield at least two other triangular numbers (120 yields 21 and 210)

Rare Properties of 120

Factorial
Tetrahedral (Pyramidal)

Common Properties of 120

Abundant
Composite
Even
Evil
Practical
Triangular
Untouchable