Q: Is 1,780,170 a Composite Number?

Why is 1,780,170 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 1,780,170 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 30 35 42 49 70 98 105 147 173 210 245 294 343 346 490 519 686 735 865 1,029 1,038 1,211 1,470 1,715 1,730 2,058 2,422 2,595 3,430 3,633 5,145 5,190 6,055 7,266 8,477 10,290 12,110 16,954 18,165 25,431 36,330 42,385 50,862 59,339 84,770 118,678 127,155 178,017 254,310 296,695 356,034 593,390 890,085 and 1,780,170, with no remainder.

Since 1,780,170 cannot be divided by just 1 and 1,780,170, 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).