21129

21,129 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21129 look like?

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

21129 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 21129:

3 × 7043

See below for interesting mathematical facts about the number 21129 from the Numbermatics database.


Names of 21129

  • Cardinal: 21129 can be written as Twenty-one thousand, one hundred twenty-nine.

Scientific notation

  • Scientific notation: 2.1129 × 104

Factors of 21129

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 7046

Divisors of 21129

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 28176
  • Sum of proper divisors (its aliquot sum) s(n): 7047
  • 21129 is a deficient number, because the sum of its proper divisors (7047) is less than itself. Its deficiency is 14082

Bases of 21129

  • Binary: 1010010100010012
  • Hexadecimal: 0x5289
  • Base-36: GAX

Squares and roots of 21129

  • 21129 squared (211292) is 446434641
  • 21129 cubed (211293) is 9432717529689
  • The square root of 21129 is 145.3581783045
  • The cube root of 21129 is 27.6456187393

Scales and comparisons

How big is 21129?
  • 21,129 seconds is equal to 5 hours, 52 minutes, 9 seconds.
  • To count from 1 to 21,129 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 21129 cubic inches would be around 2.3 feet tall.

Recreational maths with 21129

  • 21129 backwards is 92112
  • The number of decimal digits it has is: 5
  • The sum of 21129's digits is 15
  • More coming soon!

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"Number 21129 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 21129 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/21129/

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Numbermatics. 2024. "Number 21129 - Facts about the integer". https://numbermatics.com/n/21129/

The information we have on file for 21129 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 21129, math, Factors of 21129, curriculum, school, college, exams, university, Prime factorization of 21129, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, one hundred twenty-nine.

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