Q: Is 1,242,405 a Prime Number?
A: No, 1,242,405 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 1242405 can be evenly divided by 1 3 5 9 15 27 45 135 9,203 27,609 46,015 82,827 138,045 248,481 414,135 and 1,242,405, with no remainder.
Since 1,242,405 cannot be divided by just 1 and 1,242,405, it is not a prime number.