Q: Is 257,423 a Prime Number?
A: No, 257,423 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 257423 can be evenly divided by 1 137 1,879 and 257,423, with no remainder.
Since 257,423 cannot be divided by just 1 and 257,423, it is not a prime number.