2145

Names of 2145

• Cardinal: 2145 can be written as Two thousand, one hundred forty-five.

Scientific notation

• Scientific notation: 2.145 × 10³

Factors of 2145

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 32

Divisors of 2145

• Number of divisors d(n): 16
• Complete list of divisors:
  1 3 5 11 13 15 33 39 55 65 143 165 195 429 715 2145
• Sum of all divisors σ(n): 4032
• Sum of proper divisors (its aliquot sum) s(n): 1887
• 2145 is a deficient number, because the sum of its proper divisors (1887) is less than itself. Its deficiency is 258

Bases of 2145

• Binary: 100001100001₂
• Hexadecimal: 0x861
• Base-36: 1NL

Squares and roots of 2145

• 2145 squared (2145²) is 4601025
• 2145 cubed (2145³) is 9869198625
• The square root of 2145 is 46.3141447077
• The cube root of 2145 is 12.8966159021

Scales and comparisons

• 2,145 seconds is equal to 35 minutes, 45 seconds.
• To count from 1 to 2,145 would take you about thirty-five 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 2145 cubic inches would be around 1.1 feet tall.

Recreational maths with 2145

• 2145 backwards is 5412
• The number of decimal digits it has is: 4
• The sum of 2145's digits is 12
• More coming soon!