725

Names of 725

• Cardinal: 725 can be written as Seven hundred twenty-five.

Scientific notation

• Scientific notation: 7.25 × 10²

Factors of 725

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 34

Divisors of 725

• Number of divisors d(n): 6
• Complete list of divisors:
  1 5 25 29 145 725
• Sum of all divisors σ(n): 930
• Sum of proper divisors (its aliquot sum) s(n): 205
• 725 is a deficient number, because the sum of its proper divisors (205) is less than itself. Its deficiency is 520

Bases of 725

• Binary: 1011010101₂
• Hexadecimal: 0x2D5
• Base-36: K5

Squares and roots of 725

• 725 squared (725²) is 525625
• 725 cubed (725³) is 381078125
• The square root of 725 is 26.9258240357
• The cube root of 725 is 8.9835088957

Scales and comparisons

• 725 seconds is equal to 12 minutes, 5 seconds.
• To count from 1 to 725 would take you about six minutes.

  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 725 cubic inches would be around 0.7 feet tall.

Recreational maths with 725

• 725 backwards is 527
• The number of decimal digits it has is: 3
• The sum of 725's digits is 14
• More coming soon!