129138

Names of 129138

• Cardinal: 129138 can be written as One hundred twenty-nine thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 1.29138 × 10⁵

Factors of 129138

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 21528

Divisors of 129138

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 3 6 21523 43046 64569 129138
• Sum of all divisors σ(n): 258288
• Sum of proper divisors (its aliquot sum) s(n): 129150
• 129138 is an abundant number, because the sum of its proper divisors (129150) is greater than itself. Its abundance is 12

Bases of 129138

• Binary: 11111100001110010₂
• Hexadecimal: 0x1F872
• Base-36: 2RN6

Squares and roots of 129138

• 129138 squared (129138²) is 16676623044
• 129138 cubed (129138³) is 2153585746656072
• The square root of 129138 is 359.3577604561
• The cube root of 129138 is 50.5457546959

Scales and comparisons

• 129,138 seconds is equal to 1 day, 11 hours, 52 minutes, 18 seconds.
• To count from 1 to 129,138 would take you about eleven 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 129138 cubic inches would be around 4.2 feet tall.

Recreational maths with 129138

• 129138 backwards is 831921
• The number of decimal digits it has is: 6
• The sum of 129138's digits is 24
• More coming soon!