Q: Is 278,239 a Prime Number?
A: No, 278,239 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 278239 can be evenly divided by 1 13 17 221 1,259 16,367 21,403 and 278,239, with no remainder.
Since 278,239 cannot be divided by just 1 and 278,239, it is not a prime number.