21145242

Names of 21145242

• Cardinal: 21145242 can be written as Twenty-one million, one hundred forty-five thousand, two hundred forty-two.

Scientific notation

• Scientific notation: 2.1145242 × 10⁷

Factors of 21145242

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3524212

Divisors of 21145242

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 3 6 3524207 7048414 10572621 21145242
• Sum of all divisors σ(n): 42290496
• Sum of proper divisors (its aliquot sum) s(n): 21145254
• 21145242 is an abundant number, because the sum of its proper divisors (21145254) is greater than itself. Its abundance is 12

Bases of 21145242

• Binary: 1010000101010011010011010₂
• Hexadecimal: 0x142A69A
• Base-36: CL7RU

Squares and roots of 21145242

• 21145242 squared (21145242²) is 447121259238564
• 21145242 cubed (21145242³) is 9454487229944171512488
• The square root of 21145242 is 4598.3955897683
• The cube root of 21145242 is 276.5270071405

Scales and comparisons

• 21,145,242 seconds is equal to 34 weeks, 6 days, 17 hours, 40 minutes, 42 seconds.
• To count from 1 to 21,145,242 would take you about three days!

  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 21145242 cubic inches would be around 23 feet tall.

Recreational maths with 21145242

• 21145242 backwards is 24254112
• The number of decimal digits it has is: 8
• The sum of 21145242's digits is 21
• More coming soon!