Q: Is 81,720 a Composite Number?

 A: Yes, 81,720 is a composite number.

Why is 81,720 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 81,720 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 227 360 454 681 908 1,135 1,362 1,816 2,043 2,270 2,724 3,405 4,086 4,540 5,448 6,810 8,172 9,080 10,215 13,620 16,344 20,430 27,240 40,860 and 81,720, with no remainder.

Since 81,720 cannot be divided by just 1 and 81,720, it is a composite number.


More Examples

Number 81,71881,71981,72181,722
Composite? yesyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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