Q: Is 243,428 a Prime Number?
A: No, 243,428 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 243428 can be evenly divided by 1 2 4 19 38 76 3,203 6,406 12,812 60,857 121,714 and 243,428, with no remainder.
Since 243,428 cannot be divided by just 1 and 243,428, it is not a prime number.