1220385

Names of 1220385

• Cardinal: 1220385 can be written as One million, two hundred twenty thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 1.220385 × 10⁶

Factors of 1220385

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 81367

Divisors of 1220385

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 5 15 81359 244077 406795 1220385
• Sum of all divisors σ(n): 1952640
• Sum of proper divisors (its aliquot sum) s(n): 732255
• 1220385 is a deficient number, because the sum of its proper divisors (732255) is less than itself. Its deficiency is 488130

Bases of 1220385

• Binary: 100101001111100100001₂
• Hexadecimal: 0x129F21
• Base-36: Q5NL

Squares and roots of 1220385

• 1220385 squared (1220385²) is 1489339548225
• 1220385 cubed (1220385³) is 1817567644560566625
• The square root of 1220385 is 1104.7103692823
• The cube root of 1220385 is 106.8642118313

Scales and comparisons

• 1,220,385 seconds is equal to 2 weeks, 2 hours, 59 minutes, 45 seconds.
• To count from 1 to 1,220,385 would take you about three weeks!

  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 1220385 cubic inches would be around 8.9 feet tall.

Recreational maths with 1220385

• 1220385 backwards is 5830221
• The number of decimal digits it has is: 7
• The sum of 1220385's digits is 21
• More coming soon!