Q: Is 420,243 a Prime Number?
A: No, 420,243 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 420243 can be evenly divided by 1 3 127 381 1,103 3,309 140,081 and 420,243, with no remainder.
Since 420,243 cannot be divided by just 1 and 420,243, it is not a prime number.