21,409 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21409 look like?

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

21409 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 21409:

79 × 271

See below for interesting mathematical facts about the number 21409 from the Numbermatics database.

Names of 21409

  • Cardinal: 21409 can be written as Twenty-one thousand, four hundred nine.

Scientific notation

  • Scientific notation: 2.1409 × 104

Factors of 21409

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 350

Divisors of 21409

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 21760
  • Sum of proper divisors (its aliquot sum) s(n): 351
  • 21409 is a deficient number, because the sum of its proper divisors (351) is less than itself. Its deficiency is 21058

Bases of 21409

  • Binary: 1010011101000012
  • Hexadecimal: 0x53A1
  • Base-36: GIP

Squares and roots of 21409

  • 21409 squared (214092) is 458345281
  • 21409 cubed (214093) is 9812714120929
  • The square root of 21409 is 146.3181465165
  • The cube root of 21409 is 27.7672024929

Scales and comparisons

How big is 21409?
  • 21,409 seconds is equal to 5 hours, 56 minutes, 49 seconds.
  • To count from 1 to 21,409 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 21409 cubic inches would be around 2.3 feet tall.

Recreational maths with 21409

  • 21409 backwards is 90412
  • The number of decimal digits it has is: 5
  • The sum of 21409's digits is 16
  • More coming soon!

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"Number 21409 - Facts about the integer". Numbermatics.com. 2024. Web. 16 June 2024.

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Numbermatics. (2024). Number 21409 - Facts about the integer. Retrieved 16 June 2024, from https://numbermatics.com/n/21409/

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Numbermatics. 2024. "Number 21409 - Facts about the integer". https://numbermatics.com/n/21409/

The information we have on file for 21409 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 21409, math, Factors of 21409, curriculum, school, college, exams, university, Prime factorization of 21409, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, four hundred nine.

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