Q: Is 1,156,155 a Composite Number?

Why is 1,156,155 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 1,156,155 can be evenly divided by 1 3 5 7 11 13 15 21 33 35 39 49 55 65 77 91 105 121 143 147 165 195 231 245 273 363 385 429 455 539 605 637 715 735 847 1,001 1,155 1,365 1,573 1,617 1,815 1,911 2,145 2,541 2,695 3,003 3,185 4,235 4,719 5,005 5,929 7,007 7,865 8,085 9,555 11,011 12,705 15,015 17,787 21,021 23,595 29,645 33,033 35,035 55,055 77,077 88,935 105,105 165,165 231,231 385,385 and 1,156,155, with no remainder.

Since 1,156,155 cannot be divided by just 1 and 1,156,155, 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).