The Natural Number 261

List of Numbers
    Previous: 260
    Next: 262

Contact Us

Properties of the Number 261

  • Because 261 is not divisible by 2 ...
    • 261 is an odd number
    • 261 has parity 1
    • 261 is not an even number
  • Because 261 can be factored as 3 x 87 ...
    • 261 is a composite number
    • 261 is not a prime number

Alternative Representations of the Number 261

  • Base 2 (binary): 100000101
  • Base 8 (octal): 405
  • Base 16 (hexadecimal): 105
  • Roman numeral: CCLXI
  • Words: two hundred sixty-one

Divisors of the Number 261

  • 261 has 6 positive divisors: 1, 3, 9, 29, 87, 261
    • The sum of the positive divisors is 390
  • 261 has 5 proper divisors: 1, 3, 9, 29, 87
    • The sum of the proper divisors is 129
  • 261 is a deficient number since the sum of the proper divisors is less than 261
  • 261 is not a perfect number
  • 261 is not an abundant number

More Properties of the Number 261

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

4:32 am, Friday, April 28, 2017 (UTC; +0000)
Copyright © 2017 D. A. Resler.  All rights reserved.