Q: Is 815,257 a Prime Number?
A: Yes, 815,257 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 815257 can be evenly divided by 1 and 815,257, with no remainder.
Since 815,257 can be divided by just 1 and 815,257, it is a prime number.