13126721

Names of 13126721

• Cardinal: 13126721 can be written as Thirteen million, one hundred twenty-six thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.3126721 × 10⁷

Factors of 13126721

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3495

Divisors of 13126721

• Number of divisors d(n): 8
• Complete list of divisors:
  1 23 173 3299 3979 75877 570727 13126721
• Sum of all divisors σ(n): 13780800
• Sum of proper divisors (its aliquot sum) s(n): 654079
• 13126721 is a deficient number, because the sum of its proper divisors (654079) is less than itself. Its deficiency is 12472642

Bases of 13126721

• Binary: 110010000100110001000001₂
• Hexadecimal: 0xC84C41
• Base-36: 7TCN5

Squares and roots of 13126721

• 13126721 squared (13126721²) is 172310804211841
• 13126721 cubed (13126721³) is 2261875852174461703361
• The square root of 13126721 is 3623.0816993273
• The cube root of 13126721 is 235.8950085987

Scales and comparisons

• 13,126,721 seconds is equal to 21 weeks, 4 days, 22 hours, 18 minutes, 41 seconds.
• To count from 1 to 13,126,721 would take you about thirty-two weeks!

  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 13126721 cubic inches would be around 19.7 feet tall.

Recreational maths with 13126721

• 13126721 backwards is 12762131
• 13126721 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13126721's digits is 23
• More coming soon!