81742

Names of 81742

• Cardinal: 81742 can be written as Eighty-one thousand, seven hundred forty-two.

Scientific notation

• Scientific notation: 8.1742 × 10⁴

Factors of 81742

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1802

Divisors of 81742

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 23 46 1777 3554 40871 81742
• Sum of all divisors σ(n): 128016
• Sum of proper divisors (its aliquot sum) s(n): 46274
• 81742 is a deficient number, because the sum of its proper divisors (46274) is less than itself. Its deficiency is 35468

Bases of 81742

• Binary: 10011111101001110₂
• Hexadecimal: 0x13F4E
• Base-36: 1R2M

Squares and roots of 81742

• 81742 squared (81742²) is 6681754564
• 81742 cubed (81742³) is 546179981570488
• The square root of 81742 is 285.9055788193
• The cube root of 81742 is 43.3992029129

Scales and comparisons

• 81,742 seconds is equal to 22 hours, 42 minutes, 22 seconds.
• To count from 1 to 81,742 would take you about twenty-two 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 81742 cubic inches would be around 3.6 feet tall.

Recreational maths with 81742

• 81742 backwards is 24718
• The number of decimal digits it has is: 5
• The sum of 81742's digits is 22
• More coming soon!