Q: Is 42,840 a Composite Number?

Why is 42,840 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 42,840 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 17 18 20 21 24 28 30 34 35 36 40 42 45 51 56 60 63 68 70 72 84 85 90 102 105 119 120 126 136 140 153 168 170 180 204 210 238 252 255 280 306 315 340 357 360 408 420 476 504 510 595 612 630 680 714 765 840 952 1,020 1,071 1,190 1,224 1,260 1,428 1,530 1,785 2,040 2,142 2,380 2,520 2,856 3,060 3,570 4,284 4,760 5,355 6,120 7,140 8,568 10,710 14,280 21,420 and 42,840, with no remainder.

Since 42,840 cannot be divided by just 1 and 42,840, 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).