13281921

Names of 13281921

• Cardinal: 13281921 can be written as Thirteen million, two hundred eighty-one thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 1.3281921 × 10⁷

Factors of 13281921

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 491926

Divisors of 13281921

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 9 27 491923 1475769 4427307 13281921
• Sum of all divisors σ(n): 19676960
• Sum of proper divisors (its aliquot sum) s(n): 6395039
• 13281921 is a deficient number, because the sum of its proper divisors (6395039) is less than itself. Its deficiency is 6886882

Bases of 13281921

• Binary: 110010101010101010000001₂
• Hexadecimal: 0xCAAA81
• Base-36: 7WOE9

Squares and roots of 13281921

• 13281921 squared (13281921²) is 176409425450241
• 13281921 cubed (13281921³) is 2343056052485490392961
• The square root of 13281921 is 3644.4369935561
• The cube root of 13281921 is 236.8210474143

Scales and comparisons

• 13,281,921 seconds is equal to 21 weeks, 6 days, 17 hours, 25 minutes, 21 seconds.
• To count from 1 to 13,281,921 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 13281921 cubic inches would be around 19.7 feet tall.

Recreational maths with 13281921

• 13281921 backwards is 12918231
• 13281921 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13281921's digits is 27
• More coming soon!