1,191 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1191 look like?

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

1191 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 1191:

3 × 397

See below for interesting mathematical facts about the number 1191 from the Numbermatics database.

Names of 1191

  • Cardinal: 1191 can be written as One thousand, one hundred ninety-one.

Scientific notation

  • Scientific notation: 1.191 × 103

Factors of 1191

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 400

Divisors of 1191

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1592
  • Sum of proper divisors (its aliquot sum) s(n): 401
  • 1191 is a deficient number, because the sum of its proper divisors (401) is less than itself. Its deficiency is 790

Bases of 1191

  • Binary: 100101001112
  • Hexadecimal: 0x4A7
  • Base-36: X3

Squares and roots of 1191

  • 1191 squared (11912) is 1418481
  • 1191 cubed (11913) is 1689410871
  • The square root of 1191 is 34.5108678535
  • The cube root of 1191 is 10.5999525333

Scales and comparisons

How big is 1191?
  • 1,191 seconds is equal to 19 minutes, 51 seconds.
  • To count from 1 to 1,191 would take you about nineteen 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 1191 cubic inches would be around 0.9 feet tall.

Recreational maths with 1191

  • 1191 backwards is 1911
  • The number of decimal digits it has is: 4
  • The sum of 1191's digits is 12
  • More coming soon!

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The information we have on file for 1191 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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