1,405 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1405 look like?

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

1405 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 1405:

5 × 281

See below for interesting mathematical facts about the number 1405 from the Numbermatics database.

Names of 1405

  • Cardinal: 1405 can be written as One thousand, four hundred five.

Scientific notation

  • Scientific notation: 1.405 × 103

Factors of 1405

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 286

Divisors of 1405

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1692
  • Sum of proper divisors (its aliquot sum) s(n): 287
  • 1405 is a deficient number, because the sum of its proper divisors (287) is less than itself. Its deficiency is 1118

Bases of 1405

  • Binary: 101011111012
  • Hexadecimal: 0x57D
  • Base-36: 131

Squares and roots of 1405

  • 1405 squared (14052) is 1974025
  • 1405 cubed (14053) is 2773505125
  • The square root of 1405 is 37.4833296279
  • The cube root of 1405 is 11.2001913233

Scales and comparisons

How big is 1405?
  • 1,405 seconds is equal to 23 minutes, 25 seconds.
  • To count from 1 to 1,405 would take you about twenty-three 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 1405 cubic inches would be around 0.9 feet tall.

Recreational maths with 1405

  • 1405 backwards is 5041
  • The number of decimal digits it has is: 4
  • The sum of 1405's digits is 10
  • More coming soon!

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"Number 1405 - Facts about the integer". Numbermatics.com. 2024. Web. 2 March 2024.

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Numbermatics. (2024). Number 1405 - Facts about the integer. Retrieved 2 March 2024, from https://numbermatics.com/n/1405/

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Numbermatics. 2024. "Number 1405 - Facts about the integer". https://numbermatics.com/n/1405/

The information we have on file for 1405 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 1405, math, Factors of 1405, curriculum, school, college, exams, university, Prime factorization of 1405, STEM, science, technology, engineering, physics, economics, calculator, one thousand, four hundred five.

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