Q: Is 3,891,105 a Composite Number?

Why is 3,891,105 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 3,891,105 can be evenly divided by 1 3 5 9 15 19 27 37 41 45 57 95 111 123 135 171 185 205 285 333 369 513 555 615 703 779 855 999 1,107 1,517 1,665 1,845 2,109 2,337 2,565 3,515 3,895 4,551 4,995 5,535 6,327 7,011 7,585 10,545 11,685 13,653 18,981 21,033 22,755 28,823 31,635 35,055 40,959 68,265 86,469 94,905 105,165 144,115 204,795 259,407 432,345 778,221 1,297,035 and 3,891,105, with no remainder.

Since 3,891,105 cannot be divided by just 1 and 3,891,105, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).