1,251 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1251 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

1251 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

Prime factorization of 1251:

32 × 139

(3 × 3 × 139)

See below for interesting mathematical facts about the number 1251 from the Numbermatics database.

Names of 1251

  • Cardinal: 1251 can be written as One thousand, two hundred fifty-one.

Scientific notation

  • Scientific notation: 1.251 × 103

Factors of 1251

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 142

Divisors of 1251

  • Number of divisors d(n): 6
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1820
  • Sum of proper divisors (its aliquot sum) s(n): 569
  • 1251 is a deficient number, because the sum of its proper divisors (569) is less than itself. Its deficiency is 682

Bases of 1251

  • Binary: 100111000112
  • Hexadecimal: 0x4E3
  • Base-36: YR

Squares and roots of 1251

  • 1251 squared (12512) is 1565001
  • 1251 cubed (12513) is 1957816251
  • The square root of 1251 is 35.3694783677
  • The cube root of 1251 is 10.7750452641

Scales and comparisons

How big is 1251?
  • 1,251 seconds is equal to 20 minutes, 51 seconds.
  • To count from 1 to 1,251 would take you about twenty minutes.

    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 1251 cubic inches would be around 0.9 feet tall.

Recreational maths with 1251

  • 1251 backwards is 1521
  • 1251 is a Harshad number.
  • The number of decimal digits it has is: 4
  • The sum of 1251's digits is 9
  • More coming soon!

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"Number 1251 - Facts about the integer". Numbermatics.com. 2021. Web. 17 January 2021.

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Numbermatics. (2021). Number 1251 - Facts about the integer. Retrieved 17 January 2021, from https://numbermatics.com/n/1251/

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The information we have on file for 1251 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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