12391

Names of 12391

• Cardinal: 12391 can be written as Twelve thousand, three hundred ninety-one.

Scientific notation

• Scientific notation: 1.2391 × 10⁴

Factors of 12391

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 12391

Divisors of 12391

• Number of divisors d(n): 2
• Complete list of divisors:
  1 12391
• Sum of all divisors σ(n): 12392
• Sum of proper divisors (its aliquot sum) s(n): 1
• 12391 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 12390

Bases of 12391

• Binary: 11000001100111₂
• Hexadecimal: 0x3067
• Base-36: 9K7

Squares and roots of 12391

• 12391 squared (12391²) is 153536881
• 12391 cubed (12391³) is 1902475492471
• The square root of 12391 is 111.3148687283
• The cube root of 12391 is 23.1402893775

Scales and comparisons

• 12,391 seconds is equal to 3 hours, 26 minutes, 31 seconds.
• To count from 1 to 12,391 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 12391 cubic inches would be around 1.9 feet tall.

Recreational maths with 12391

• 12391 backwards is 19321
• The number of decimal digits it has is: 5
• The sum of 12391's digits is 16
• More coming soon!