Q: Is 1,338,645 a Composite Number?

Why is 1,338,645 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 1,338,645 can be evenly divided by 1 3 5 7 11 15 19 21 33 35 55 57 61 77 95 105 133 165 183 209 231 285 305 385 399 427 627 665 671 915 1,045 1,155 1,159 1,281 1,463 1,995 2,013 2,135 3,135 3,355 3,477 4,389 4,697 5,795 6,405 7,315 8,113 10,065 12,749 14,091 17,385 21,945 23,485 24,339 38,247 40,565 63,745 70,455 89,243 121,695 191,235 267,729 446,215 and 1,338,645, with no remainder.

Since 1,338,645 cannot be divided by just 1 and 1,338,645, 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).