Q: Is 278,375 a Prime Number?
A: No, 278,375 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 278375 can be evenly divided by 1 5 17 25 85 125 131 425 655 2,125 2,227 3,275 11,135 16,375 55,675 and 278,375, with no remainder.
Since 278,375 cannot be divided by just 1 and 278,375, it is not a prime number.