21242

Names of 21242

• Cardinal: 21242 can be written as Twenty-one thousand, two hundred forty-two.

Scientific notation

• Scientific notation: 2.1242 × 10⁴

Factors of 21242

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 77

Divisors of 21242

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 13 19 26 38 43 86 247 494 559 817 1118 1634 10621 21242
• Sum of all divisors σ(n): 36960
• Sum of proper divisors (its aliquot sum) s(n): 15718
• 21242 is a deficient number, because the sum of its proper divisors (15718) is less than itself. Its deficiency is 5524

Bases of 21242

• Binary: 101001011111010₂
• Hexadecimal: 0x52FA
• Base-36: GE2

Squares and roots of 21242

• 21242 squared (21242²) is 451222564
• 21242 cubed (21242³) is 9584869704488
• The square root of 21242 is 145.7463550145
• The cube root of 21242 is 27.6948149833

Scales and comparisons

• 21,242 seconds is equal to 5 hours, 54 minutes, 2 seconds.
• To count from 1 to 21,242 would take you about five 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 21242 cubic inches would be around 2.3 feet tall.

Recreational maths with 21242

• 21242 backwards is 24212
• The number of decimal digits it has is: 5
• The sum of 21242's digits is 11
• More coming soon!