Q: Is 139,605 a Prime Number?
A: No, 139,605 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 139605 can be evenly divided by 1 3 5 15 41 123 205 227 615 681 1,135 3,405 9,307 27,921 46,535 and 139,605, with no remainder.
Since 139,605 cannot be divided by just 1 and 139,605, it is not a prime number.