Q: Is 1,321,840 a Composite Number?

Why is 1,321,840 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 1,321,840 can be evenly divided by 1 2 4 5 8 10 13 16 20 26 31 40 41 52 62 65 80 82 104 124 130 155 164 205 208 248 260 310 328 403 410 496 520 533 620 656 806 820 1,040 1,066 1,240 1,271 1,612 1,640 2,015 2,132 2,480 2,542 2,665 3,224 3,280 4,030 4,264 5,084 5,330 6,355 6,448 8,060 8,528 10,168 10,660 12,710 16,120 16,523 20,336 21,320 25,420 32,240 33,046 42,640 50,840 66,092 82,615 101,680 132,184 165,230 264,368 330,460 660,920 and 1,321,840, with no remainder.

Since 1,321,840 cannot be divided by just 1 and 1,321,840, 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).