1261

1,261 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1261 look like?

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

1261 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 1261:

13 × 97

See below for interesting mathematical facts about the number 1261 from the Numbermatics database.


Names of 1261

  • Cardinal: 1261 can be written as One thousand, two hundred sixty-one.

Scientific notation

  • Scientific notation: 1.261 × 103

Factors of 1261

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 110

Divisors of 1261

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1372
  • Sum of proper divisors (its aliquot sum) s(n): 111
  • 1261 is a deficient number, because the sum of its proper divisors (111) is less than itself. Its deficiency is 1150

Bases of 1261

  • Binary: 100111011012
  • Hexadecimal: 0x4ED
  • Base-36: Z1

Squares and roots of 1261

  • 1261 squared (12612) is 1590121
  • 1261 cubed (12613) is 2005142581
  • The square root of 1261 is 35.5105618089
  • The cube root of 1261 is 10.8036795875

Scales and comparisons

How big is 1261?
  • 1,261 seconds is equal to 21 minutes, 1 second.
  • To count from 1 to 1,261 would take you about twenty-one 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 1261 cubic inches would be around 0.9 feet tall.

Recreational maths with 1261

  • 1261 backwards is 1621
  • The number of decimal digits it has is: 4
  • The sum of 1261's digits is 10
  • More coming soon!

Link to this page

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:

Cite this page

MLA style:
"Number 1261 - Facts about the integer". Numbermatics.com. 2020. Web. 21 September 2020.

APA style:
Numbermatics. (2020). Number 1261 - Facts about the integer. Retrieved 21 September 2020, from https://numbermatics.com/n/1261/

Chicago style:
Numbermatics. 2020. "Number 1261 - Facts about the integer". https://numbermatics.com/n/1261/

The information we have on file for 1261 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 1261, math, Factors of 1261, curriculum, school, college, exams, university, Prime factorization of 1261, STEM, science, technology, engineering, physics, economics, calculator, one thousand, two hundred sixty-one.