21042

Names of 21042

• Cardinal: 21042 can be written as Twenty-one thousand and forty-two.

Scientific notation

• Scientific notation: 2.1042 × 10⁴

Factors of 21042

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 179

Divisors of 21042

• Number of divisors d(n): 24
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 42 63 126 167 334 501 1002 1169 1503 2338 3006 3507 7014 10521 21042
• Sum of all divisors σ(n): 52416
• Sum of proper divisors (its aliquot sum) s(n): 31374
• 21042 is an abundant number, because the sum of its proper divisors (31374) is greater than itself. Its abundance is 10332

Bases of 21042

• Binary: 101001000110010₂
• Hexadecimal: 0x5232
• Base-36: G8I

Squares and roots of 21042

• 21042 squared (21042²) is 442765764
• 21042 cubed (21042³) is 9316677206088
• The square root of 21042 is 145.0586088447
• The cube root of 21042 is 27.6076223433

Scales and comparisons

• 21,042 seconds is equal to 5 hours, 50 minutes, 42 seconds.
• To count from 1 to 21,042 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 21042 cubic inches would be around 2.3 feet tall.

Recreational maths with 21042

• 21042 backwards is 24012
• 21042 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21042's digits is 9
• More coming soon!