Q: Is 1,218,280 a Composite Number?

Why is 1,218,280 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 1,218,280 can be evenly divided by 1 2 4 5 7 8 10 14 19 20 28 35 38 40 56 70 76 95 133 140 152 190 229 266 280 380 458 532 665 760 916 1,064 1,145 1,330 1,603 1,832 2,290 2,660 3,206 4,351 4,580 5,320 6,412 8,015 8,702 9,160 12,824 16,030 17,404 21,755 30,457 32,060 34,808 43,510 60,914 64,120 87,020 121,828 152,285 174,040 243,656 304,570 609,140 and 1,218,280, with no remainder.

Since 1,218,280 cannot be divided by just 1 and 1,218,280, 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).