25991

25,991 is an odd composite number composed of three prime numbers multiplied together.

What does the number 25991 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

25991 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 25991:

7 × 47 × 79

See below for interesting mathematical facts about the number 25991 from the Numbermatics database.

Names of 25991

  • Cardinal: 25991 can be written as Twenty-five thousand, nine hundred ninety-one.

Scientific notation

  • Scientific notation: 2.5991 × 104

Factors of 25991

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 133

Divisors of 25991

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 30720
  • Sum of proper divisors (its aliquot sum) s(n): 4729
  • 25991 is a deficient number, because the sum of its proper divisors (4729) is less than itself. Its deficiency is 21262

Bases of 25991

  • Binary: 1100101100001112
  • Hexadecimal: 0x6587
  • Base-36: K1Z

Squares and roots of 25991

  • 25991 squared (259912) is 675532081
  • 25991 cubed (259913) is 17557754317271
  • The square root of 25991 is 161.2172447351
  • The cube root of 25991 is 29.6215420249

Scales and comparisons

How big is 25991?
  • 25,991 seconds is equal to 7 hours, 13 minutes, 11 seconds.
  • To count from 1 to 25,991 would take you about seven hours.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 25991 cubic inches would be around 2.5 feet tall.

Recreational maths with 25991

  • 25991 backwards is 19952
  • The number of decimal digits it has is: 5
  • The sum of 25991's digits is 26
  • More coming soon!

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The information we have on file for 25991 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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