Q: Is 2,155,140 a Composite Number?

Why is 2,155,140 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 2,155,140 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 90 108 117 130 135 156 180 195 234 260 270 307 351 390 468 540 585 614 702 780 921 1,170 1,228 1,404 1,535 1,755 1,842 2,340 2,763 3,070 3,510 3,684 3,991 4,605 5,526 6,140 7,020 7,982 8,289 9,210 11,052 11,973 13,815 15,964 16,578 18,420 19,955 23,946 27,630 33,156 35,919 39,910 41,445 47,892 55,260 59,865 71,838 79,820 82,890 107,757 119,730 143,676 165,780 179,595 215,514 239,460 359,190 431,028 538,785 718,380 1,077,570 and 2,155,140, with no remainder.

Since 2,155,140 cannot be divided by just 1 and 2,155,140, 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).