Q: Is 1,815,660 a Composite Number?

Why is 1,815,660 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 1,815,660 can be evenly divided by 1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 28 30 33 35 36 42 44 45 55 60 63 66 70 77 84 90 99 105 110 126 131 132 140 154 165 180 198 210 220 231 252 262 308 315 330 385 393 396 420 462 495 524 630 655 660 693 770 786 917 924 990 1,155 1,179 1,260 1,310 1,386 1,441 1,540 1,572 1,834 1,965 1,980 2,310 2,358 2,620 2,751 2,772 2,882 3,465 3,668 3,930 4,323 4,585 4,620 4,716 5,502 5,764 5,895 6,930 7,205 7,860 8,253 8,646 9,170 10,087 11,004 11,790 12,969 13,755 13,860 14,410 16,506 17,292 18,340 20,174 21,615 23,580 25,938 27,510 28,820 30,261 33,012 40,348 41,265 43,230 50,435 51,876 55,020 60,522 64,845 82,530 86,460 90,783 100,870 121,044 129,690 151,305 165,060 181,566 201,740 259,380 302,610 363,132 453,915 605,220 907,830 and 1,815,660, with no remainder.

Since 1,815,660 cannot be divided by just 1 and 1,815,660, 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).