Q: Is 121,905 a Composite Number?

 A: Yes, 121,905 is a composite number.

Why is 121,905 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 121,905 can be evenly divided by 1 3 5 7 9 15 21 27 35 43 45 63 81 105 129 135 189 215 301 315 387 405 567 645 903 945 1,161 1,505 1,935 2,709 2,835 3,483 4,515 5,805 8,127 13,545 17,415 24,381 40,635 and 121,905, with no remainder.

Since 121,905 cannot be divided by just 1 and 121,905, it is a composite number.


More Examples

Number 121,903121,904121,906121,907
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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