Q: Is 1,781,520 a Composite Number?

Why is 1,781,520 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 1,781,520 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 39 40 48 52 60 65 78 80 104 120 130 156 195 208 240 260 312 390 520 571 624 780 1,040 1,142 1,560 1,713 2,284 2,855 3,120 3,426 4,568 5,710 6,852 7,423 8,565 9,136 11,420 13,704 14,846 17,130 22,269 22,840 27,408 29,692 34,260 37,115 44,538 45,680 59,384 68,520 74,230 89,076 111,345 118,768 137,040 148,460 178,152 222,690 296,920 356,304 445,380 593,840 890,760 and 1,781,520, with no remainder.

Since 1,781,520 cannot be divided by just 1 and 1,781,520, 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).