21265

21,265 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21265 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21265 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21265:

5 × 4253

See below for interesting mathematical facts about the number 21265 from the Numbermatics database.


Names of 21265

  • Cardinal: 21265 can be written as Twenty-one thousand, two hundred sixty-five.

Scientific notation

  • Scientific notation: 2.1265 × 104

Factors of 21265

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 4258

Divisors of 21265

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 25524
  • Sum of proper divisors (its aliquot sum) s(n): 4259
  • 21265 is a deficient number, because the sum of its proper divisors (4259) is less than itself. Its deficiency is 17006

Bases of 21265

  • Binary: 1010011000100012
  • Hexadecimal: 0x5311
  • Base-36: GEP

Squares and roots of 21265

  • 21265 squared (212652) is 452200225
  • 21265 cubed (212653) is 9616037784625
  • The square root of 21265 is 145.8252378707
  • The cube root of 21265 is 27.7048069959

Scales and comparisons

How big is 21265?
  • 21,265 seconds is equal to 5 hours, 54 minutes, 25 seconds.
  • To count from 1 to 21,265 would take you about five 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 21265 cubic inches would be around 2.3 feet tall.

Recreational maths with 21265

  • 21265 backwards is 56212
  • The number of decimal digits it has is: 5
  • The sum of 21265's digits is 16
  • More coming soon!

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"Number 21265 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 21265 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/21265/

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The information we have on file for 21265 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!

Keywords: Divisors of 21265, math, Factors of 21265, curriculum, school, college, exams, university, Prime factorization of 21265, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, two hundred sixty-five.

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