Q: Is 687,420 a Composite Number?

Why is 687,420 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 687,420 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 19 20 27 30 36 38 45 54 57 60 67 76 90 95 108 114 134 135 171 180 190 201 228 268 270 285 335 342 380 402 513 540 570 603 670 684 804 855 1,005 1,026 1,140 1,206 1,273 1,340 1,710 1,809 2,010 2,052 2,412 2,546 2,565 3,015 3,420 3,618 3,819 4,020 5,092 5,130 6,030 6,365 7,236 7,638 9,045 10,260 11,457 12,060 12,730 15,276 18,090 19,095 22,914 25,460 34,371 36,180 38,190 45,828 57,285 68,742 76,380 114,570 137,484 171,855 229,140 343,710 and 687,420, with no remainder.

Since 687,420 cannot be divided by just 1 and 687,420, 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).