Q: Is 1,242,557 a Prime Number?
A: No, 1,242,557 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 1242557 can be evenly divided by 1 1,021 1,217 and 1,242,557, with no remainder.
Since 1,242,557 cannot be divided by just 1 and 1,242,557, it is not a prime number.