Q: Is 278,604 a Prime Number?
A: No, 278,604 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 278604 can be evenly divided by 1 2 3 4 6 9 12 18 36 71 109 142 213 218 284 327 426 436 639 654 852 981 1,278 1,308 1,962 2,556 3,924 7,739 15,478 23,217 30,956 46,434 69,651 92,868 139,302 and 278,604, with no remainder.
Since 278,604 cannot be divided by just 1 and 278,604, it is not a prime number.