2145

2,145 is an odd composite number composed of four prime numbers multiplied together.

What does the number 2145 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

2145 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 2145:

3 × 5 × 11 × 13

See below for interesting mathematical facts about the number 2145 from the Numbermatics database.


Names of 2145

  • Cardinal: 2145 can be written as Two thousand, one hundred forty-five.

Scientific notation

  • Scientific notation: 2.145 × 103

Factors of 2145

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 32

Divisors of 2145

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 4032
  • Sum of proper divisors (its aliquot sum) s(n): 1887
  • 2145 is a deficient number, because the sum of its proper divisors (1887) is less than itself. Its deficiency is 258

Bases of 2145

  • Binary: 1000011000012
  • Hexadecimal: 0x861
  • Base-36: 1NL

Squares and roots of 2145

  • 2145 squared (21452) is 4601025
  • 2145 cubed (21453) is 9869198625
  • The square root of 2145 is 46.3141447077
  • The cube root of 2145 is 12.8966159021

Scales and comparisons

How big is 2145?
  • 2,145 seconds is equal to 35 minutes, 45 seconds.
  • To count from 1 to 2,145 would take you about thirty-five 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 2145 cubic inches would be around 1.1 feet tall.

Recreational maths with 2145

  • 2145 backwards is 5412
  • The number of decimal digits it has is: 4
  • The sum of 2145's digits is 12
  • More coming soon!

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The information we have on file for 2145 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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