21421

21,421 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21421 look like?

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

21421 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 21421:

31 × 691

See below for interesting mathematical facts about the number 21421 from the Numbermatics database.


Names of 21421

  • Cardinal: 21421 can be written as Twenty-one thousand, four hundred twenty-one.

Scientific notation

  • Scientific notation: 2.1421 × 104

Factors of 21421

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 722

Divisors of 21421

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 22144
  • Sum of proper divisors (its aliquot sum) s(n): 723
  • 21421 is a deficient number, because the sum of its proper divisors (723) is less than itself. Its deficiency is 20698

Bases of 21421

  • Binary: 1010011101011012
  • Hexadecimal: 0x53AD
  • Base-36: GJ1

Squares and roots of 21421

  • 21421 squared (214212) is 458859241
  • 21421 cubed (214213) is 9829223801461
  • The square root of 21421 is 146.3591473055
  • The cube root of 21421 is 27.7723894733

Scales and comparisons

How big is 21421?
  • 21,421 seconds is equal to 5 hours, 57 minutes, 1 second.
  • To count from 1 to 21,421 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 21421 cubic inches would be around 2.3 feet tall.

Recreational maths with 21421

  • 21421 backwards is 12412
  • The number of decimal digits it has is: 5
  • The sum of 21421's digits is 10
  • More coming soon!

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"Number 21421 - Facts about the integer". Numbermatics.com. 2024. Web. 24 May 2024.

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Numbermatics. (2024). Number 21421 - Facts about the integer. Retrieved 24 May 2024, from https://numbermatics.com/n/21421/

Chicago style:
Numbermatics. 2024. "Number 21421 - Facts about the integer". https://numbermatics.com/n/21421/

The information we have on file for 21421 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 21421, math, Factors of 21421, curriculum, school, college, exams, university, Prime factorization of 21421, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, four hundred twenty-one.

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