71

Names of 71

• Cardinal: 71 can be written as Seventy-one.

Scientific notation

• Scientific notation: 7.1 × 10¹

Factors of 71

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 71

Divisors of 71

• Number of divisors d(n): 2
• Complete list of divisors:
  1 71
• Sum of all divisors σ(n): 72
• Sum of proper divisors (its aliquot sum) s(n): 1
• 71 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 70

Bases of 71

• Binary: 1000111₂
• Hexadecimal: 0x47
• Base-36: 1Z

Squares and roots of 71

• 71 squared (71²) is 5041
• 71 cubed (71³) is 357911
• The square root of 71 is 8.4261497731
• The cube root of 71 is 4.1408177495

Scales and comparisons

• 71 seconds is equal to 1 minute, 11 seconds.
• To count from 1 to 71 would take you about thirty-five seconds.

  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 71 cubic inches would be around 0.3 feet tall.

Recreational maths with 71

• 71 backwards is 17
• 71 is a twin prime! Its twin is 73
• The number of decimal digits it has is: 2
• The sum of 71's digits is 8
• More coming soon!