Q: Is 1,242,355 a Prime Number?
A: No, 1,242,355 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 1242355 can be evenly divided by 1 5 241 1,031 1,205 5,155 248,471 and 1,242,355, with no remainder.
Since 1,242,355 cannot be divided by just 1 and 1,242,355, it is not a prime number.