Q: Is 1,621,120 a Composite Number?

Why is 1,621,120 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 1,621,120 can be evenly divided by 1 2 4 5 8 10 16 17 20 32 34 40 64 68 80 85 128 136 149 160 170 272 298 320 340 544 596 640 680 745 1,088 1,192 1,360 1,490 2,176 2,384 2,533 2,720 2,980 4,768 5,066 5,440 5,960 9,536 10,132 10,880 11,920 12,665 19,072 20,264 23,840 25,330 40,528 47,680 50,660 81,056 95,360 101,320 162,112 202,640 324,224 405,280 810,560 and 1,621,120, with no remainder.

Since 1,621,120 cannot be divided by just 1 and 1,621,120, 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).