Q: Is 1,218,420 a Composite Number?

Why is 1,218,420 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 1,218,420 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 84 90 105 126 140 180 210 252 315 420 630 967 1,260 1,934 2,901 3,868 4,835 5,802 6,769 8,703 9,670 11,604 13,538 14,505 17,406 19,340 20,307 27,076 29,010 33,845 34,812 40,614 43,515 58,020 60,921 67,690 81,228 87,030 101,535 121,842 135,380 174,060 203,070 243,684 304,605 406,140 609,210 and 1,218,420, with no remainder.

Since 1,218,420 cannot be divided by just 1 and 1,218,420, 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).