21261

Names of 21261

• Cardinal: 21261 can be written as Twenty-one thousand, two hundred sixty-one.

Scientific notation

• Scientific notation: 2.1261 × 10⁴

Factors of 21261

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 395

Divisors of 21261

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 19 57 373 1119 7087 21261
• Sum of all divisors σ(n): 29920
• Sum of proper divisors (its aliquot sum) s(n): 8659
• 21261 is a deficient number, because the sum of its proper divisors (8659) is less than itself. Its deficiency is 12602

Bases of 21261

• Binary: 101001100001101₂
• Hexadecimal: 0x530D
• Base-36: GEL

Squares and roots of 21261

• 21261 squared (21261²) is 452030121
• 21261 cubed (21261³) is 9610612402581
• The square root of 21261 is 145.8115221785
• The cube root of 21261 is 27.7030697723

Scales and comparisons

• 21,261 seconds is equal to 5 hours, 54 minutes, 21 seconds.
• To count from 1 to 21,261 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 21261 cubic inches would be around 2.3 feet tall.

Recreational maths with 21261

• 21261 backwards is 16212
• The number of decimal digits it has is: 5
• The sum of 21261's digits is 12
• More coming soon!