Q: Is 1,561,680 a Composite Number?

Why is 1,561,680 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 1,561,680 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 81 90 108 120 135 144 162 180 216 240 241 270 324 360 405 432 482 540 648 720 723 810 964 1,080 1,205 1,296 1,446 1,620 1,928 2,160 2,169 2,410 2,892 3,240 3,615 3,856 4,338 4,820 5,784 6,480 6,507 7,230 8,676 9,640 10,845 11,568 13,014 14,460 17,352 19,280 19,521 21,690 26,028 28,920 32,535 34,704 39,042 43,380 52,056 57,840 65,070 78,084 86,760 97,605 104,112 130,140 156,168 173,520 195,210 260,280 312,336 390,420 520,560 780,840 and 1,561,680, with no remainder.

Since 1,561,680 cannot be divided by just 1 and 1,561,680, 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).