11981

Names of 11981

• Cardinal: 11981 can be written as Eleven thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 1.1981 × 10⁴

Factors of 11981

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 11981

Divisors of 11981

• Number of divisors d(n): 2
• Complete list of divisors:
  1 11981
• Sum of all divisors σ(n): 11982
• Sum of proper divisors (its aliquot sum) s(n): 1
• 11981 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 11980

Bases of 11981

• Binary: 10111011001101₂
• Hexadecimal: 0x2ECD
• Base-36: 98T

Squares and roots of 11981

• 11981 squared (11981²) is 143544361
• 11981 cubed (11981³) is 1719804989141
• The square root of 11981 is 109.4577544079
• The cube root of 11981 is 22.8821953735

Scales and comparisons

• 11,981 seconds is equal to 3 hours, 19 minutes, 41 seconds.
• To count from 1 to 11,981 would take you about three hours.

  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 11981 cubic inches would be around 1.9 feet tall.

Recreational maths with 11981

• 11981 backwards is 18911
• The number of decimal digits it has is: 5
• The sum of 11981's digits is 20
• More coming soon!