1,721 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 1721 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

1721 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 1721:


See below for interesting mathematical facts about the number 1721 from the Numbermatics database.

Names of 1721

  • Cardinal: 1721 can be written as One thousand, seven hundred twenty-one.

Scientific notation

  • Scientific notation: 1.721 × 103

Factors of 1721

  • Number of distinct prime factors ω(n): 1
  • Total number of prime factors Ω(n): 1
  • Sum of prime factors: 1721

Divisors of 1721

  • Number of divisors d(n): 2
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1722
  • Sum of proper divisors (its aliquot sum) s(n): 1
  • 1721 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1720

Bases of 1721

  • Binary: 110101110012
  • Hexadecimal: 0x6B9
  • Base-36: 1BT

Squares and roots of 1721

  • 1721 squared (17212) is 2961841
  • 1721 cubed (17213) is 5097328361
  • The square root of 1721 is 41.4849370255
  • The cube root of 1721 is 11.9837743669

Scales and comparisons

How big is 1721?
  • 1,721 seconds is equal to 28 minutes, 41 seconds.
  • To count from 1 to 1,721 would take you about twenty-eight 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 1721 cubic inches would be around 1 feet tall.

Recreational maths with 1721

  • 1721 backwards is 1271
  • 1721 is a twin prime! Its twin is 1723
  • The number of decimal digits it has is: 4
  • The sum of 1721's digits is 11
  • More coming soon!

Copy this link to share with anyone:

Share this page on social media:

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 1721 - Facts about the integer". Numbermatics.com. 2023. Web. 25 September 2023.

APA style:
Numbermatics. (2023). Number 1721 - Facts about the integer. Retrieved 25 September 2023, from https://numbermatics.com/n/1721/

Chicago style:
Numbermatics. 2023. "Number 1721 - Facts about the integer". https://numbermatics.com/n/1721/

The information we have on file for 1721 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 1721, math, Factors of 1721, curriculum, school, college, exams, university, Prime factorization of 1721, STEM, science, technology, engineering, physics, economics, calculator, one thousand, seven hundred twenty-one.

Oh no. Javascript is switched off in your browser.
Some bits of this website may not work unless you switch it on.