Q: Is 815,490 a Composite Number?

Why is 815,490 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 815,490 can be evenly divided by 1 2 3 5 6 9 10 13 15 17 18 26 30 34 39 41 45 51 65 78 82 85 90 102 117 123 130 153 170 195 205 221 234 246 255 306 369 390 410 442 510 533 585 615 663 697 738 765 1,066 1,105 1,170 1,230 1,326 1,394 1,530 1,599 1,845 1,989 2,091 2,210 2,665 3,198 3,315 3,485 3,690 3,978 4,182 4,797 5,330 6,273 6,630 6,970 7,995 9,061 9,594 9,945 10,455 12,546 15,990 18,122 19,890 20,910 23,985 27,183 31,365 45,305 47,970 54,366 62,730 81,549 90,610 135,915 163,098 271,830 407,745 and 815,490, with no remainder.

Since 815,490 cannot be divided by just 1 and 815,490, 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).