Q: Is 1,115,205 a Composite Number?

Why is 1,115,205 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 1,115,205 can be evenly divided by 1 3 5 7 13 15 19 21 35 39 43 57 65 91 95 105 129 133 195 215 247 273 285 301 399 455 559 645 665 741 817 903 1,235 1,365 1,505 1,677 1,729 1,995 2,451 2,795 3,705 3,913 4,085 4,515 5,187 5,719 8,385 8,645 10,621 11,739 12,255 17,157 19,565 25,935 28,595 31,863 53,105 58,695 74,347 85,785 159,315 223,041 371,735 and 1,115,205, with no remainder.

Since 1,115,205 cannot be divided by just 1 and 1,115,205, 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).