1289

Names of 1289

• Cardinal: 1289 can be written as One thousand, two hundred eighty-nine.

Scientific notation

• Scientific notation: 1.289 × 10³

Factors of 1289

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1289

Divisors of 1289

• Number of divisors d(n): 2
• Complete list of divisors:
  1 1289
• Sum of all divisors σ(n): 1290
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1289 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1288

Bases of 1289

• Binary: 10100001001₂
• Hexadecimal: 0x509
• Base-36: ZT

Squares and roots of 1289

• 1289 squared (1289²) is 1661521
• 1289 cubed (1289³) is 2141700569
• The square root of 1289 is 35.9026461421
• The cube root of 1289 is 10.8830587205

Scales and comparisons

• 1,289 seconds is equal to 21 minutes, 29 seconds.
• To count from 1 to 1,289 would take you about twenty-one 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 1289 cubic inches would be around 0.9 feet tall.

Recreational maths with 1289

• 1289 backwards is 9821
• 1289 is a twin prime! Its twin is 1291
• The number of decimal digits it has is: 4
• The sum of 1289's digits is 20
• More coming soon!