Q: Is 6,921,915 a Composite Number?

Why is 6,921,915 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 6,921,915 can be evenly divided by 1 3 5 7 11 13 15 21 33 35 39 55 65 77 91 105 143 165 195 231 273 385 429 455 461 715 1,001 1,155 1,365 1,383 2,145 2,305 3,003 3,227 5,005 5,071 5,993 6,915 9,681 15,015 15,213 16,135 17,979 25,355 29,965 35,497 41,951 48,405 65,923 76,065 89,895 106,491 125,853 177,485 197,769 209,755 329,615 461,461 532,455 629,265 988,845 1,384,383 2,307,305 and 6,921,915, with no remainder.

Since 6,921,915 cannot be divided by just 1 and 6,921,915, 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).