Q: Is 1,221,570 a Composite Number?

Why is 1,221,570 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 1,221,570 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 49 63 70 90 98 105 126 147 210 245 277 294 315 441 490 554 630 735 831 882 1,385 1,470 1,662 1,939 2,205 2,493 2,770 3,878 4,155 4,410 4,986 5,817 8,310 9,695 11,634 12,465 13,573 17,451 19,390 24,930 27,146 29,085 34,902 40,719 58,170 67,865 81,438 87,255 122,157 135,730 174,510 203,595 244,314 407,190 610,785 and 1,221,570, with no remainder.

Since 1,221,570 cannot be divided by just 1 and 1,221,570, 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).