The Natural Number 129

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Properties of the Number 129

  • Because 129 is not divisible by 2 ...
    • 129 is an odd number
    • 129 has parity 1
    • 129 is not an even number
  • Because 129 can be factored as 3 x 43 ...
    • 129 is a composite number
    • 129 is not a prime number

Alternative Representations of the Number 129

  • Base 2 (binary): 10000001
  • Base 8 (octal): 201
  • Base 16 (hexadecimal): 81
  • Roman numeral: CXXIX
  • Words: one hundred twenty-nine

Divisors of the Number 129

  • 129 has 4 positive divisors: 1, 3, 43, 129
    • The sum of the positive divisors is 176
  • 129 has 3 proper divisors: 1, 3, 43
    • The sum of the proper divisors is 47
  • 129 is a deficient number since the sum of the proper divisors is less than 129
  • 129 is not a perfect number
  • 129 is not an abundant number

More Properties of the Number 129

  • 129 is not a square number
  • 129 is not a cube number
  • 129 is not a palindromic number
  • 129 is not a Fibonacci number
  • 129 is not a Lucas number

9:13 pm, Wednesday, August 27, 2014 (UTC; +0000)
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