Number Gossip

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Unique Properties of 1111

  • 1111 is the sum of the digits of the first 100 primes
  • 1111 is the smallest number n for which there are exactly ten k such that n equals k plus the reverse of k
  • 1111 is the smallest number such that its square contains 1234 as a substring (11112 = 1234321)
  • 1111 is the smallest composite number having the same digits as their prime factors (with multiplicity), excluding zero digits (1111 = 11*101)
  • 1111 is the smallest strobogrammatic composite numbes whose prime factors are strobogrammatic as well

Rare Properties of 1111

Repunit

Common Properties of 1111

Composite
Deficient
Evil
Odd
Palindrome
Smith (Joke)
Square-free
Undulating