Q: Is 1,581,720 a Composite Number?

Why is 1,581,720 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 1,581,720 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 49 56 60 70 84 98 105 120 140 147 168 196 210 245 269 280 294 392 420 490 538 588 735 807 840 980 1,076 1,176 1,345 1,470 1,614 1,883 1,960 2,152 2,690 2,940 3,228 3,766 4,035 5,380 5,649 5,880 6,456 7,532 8,070 9,415 10,760 11,298 13,181 15,064 16,140 18,830 22,596 26,362 28,245 32,280 37,660 39,543 45,192 52,724 56,490 65,905 75,320 79,086 105,448 112,980 131,810 158,172 197,715 225,960 263,620 316,344 395,430 527,240 790,860 and 1,581,720, with no remainder.

Since 1,581,720 cannot be divided by just 1 and 1,581,720, 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).