Q: Is 257,409 a Prime Number?
A: No, 257,409 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 257409 can be evenly divided by 1 3 9 37 111 333 773 2,319 6,957 28,601 85,803 and 257,409, with no remainder.
Since 257,409 cannot be divided by just 1 and 257,409, it is not a prime number.