1381

Names of 1381

• Cardinal: 1381 can be written as One thousand, three hundred eighty-one.

Scientific notation

• Scientific notation: 1.381 × 10³

Factors of 1381

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1381

Divisors of 1381

• Number of divisors d(n): 2
• Complete list of divisors:
  1 1381
• Sum of all divisors σ(n): 1382
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1381 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1380

Bases of 1381

• Binary: 10101100101₂
• Hexadecimal: 0x565
• Base-36: 12D

Squares and roots of 1381

• 1381 squared (1381²) is 1907161
• 1381 cubed (1381³) is 2633789341
• The square root of 1381 is 37.1618083521
• The cube root of 1381 is 11.1360513839

Scales and comparisons

• 1,381 seconds is equal to 23 minutes, 1 second.
• To count from 1 to 1,381 would take you about twenty-three 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 1381 cubic inches would be around 0.9 feet tall.

Recreational maths with 1381

• 1381 backwards is 1831
• The number of decimal digits it has is: 4
• The sum of 1381's digits is 13
• More coming soon!