Q: Is 621,720 a Composite Number?

Why is 621,720 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 621,720 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 30 33 36 40 44 45 55 60 66 72 88 90 99 110 120 132 157 165 180 198 220 264 314 330 360 396 440 471 495 628 660 785 792 942 990 1,256 1,320 1,413 1,570 1,727 1,884 1,980 2,355 2,826 3,140 3,454 3,768 3,960 4,710 5,181 5,652 6,280 6,908 7,065 8,635 9,420 10,362 11,304 13,816 14,130 15,543 17,270 18,840 20,724 25,905 28,260 31,086 34,540 41,448 51,810 56,520 62,172 69,080 77,715 103,620 124,344 155,430 207,240 310,860 and 621,720, with no remainder.

Since 621,720 cannot be divided by just 1 and 621,720, 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).