The Natural Number 45

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Properties of the Number 45

  • Because 45 is not divisible by 2 ...
    • 45 is an odd number
    • 45 has parity 1
    • 45 is not an even number
  • Because 45 can be factored as 3 x 15 ...
    • 45 is a composite number
    • 45 is not a prime number

Alternative Representations of the Number 45

  • Base 2 (binary): 101101
  • Base 8 (octal): 55
  • Base 16 (hexadecimal): 2D
  • Roman numeral: XLV
  • Words: forty-five

Divisors of the Number 45

  • 45 has 6 positive divisors: 1, 3, 5, 9, 15, 45
    • The sum of the positive divisors is 78
  • 45 has 5 proper divisors: 1, 3, 5, 9, 15
    • The sum of the proper divisors is 33
  • 45 is a deficient number since the sum of the proper divisors is less than 45
  • 45 is not a perfect number
  • 45 is not an abundant number

More Properties of the Number 45

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

4:25 am, Thursday, March 23, 2017 (UTC; +0000)
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