Q: Is 1,215,720 a Composite Number?

Why is 1,215,720 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 1,215,720 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 99 110 120 132 165 180 198 220 264 307 330 360 396 440 495 614 660 792 921 990 1,228 1,320 1,535 1,842 1,980 2,456 2,763 3,070 3,377 3,684 3,960 4,605 5,526 6,140 6,754 7,368 9,210 10,131 11,052 12,280 13,508 13,815 16,885 18,420 20,262 22,104 27,016 27,630 30,393 33,770 36,840 40,524 50,655 55,260 60,786 67,540 81,048 101,310 110,520 121,572 135,080 151,965 202,620 243,144 303,930 405,240 607,860 and 1,215,720, with no remainder.

Since 1,215,720 cannot be divided by just 1 and 1,215,720, 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).