Q: Is 243,642 a Prime Number?
A: No, 243,642 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 243642 can be evenly divided by 1 2 3 6 7 14 21 42 5,801 11,602 17,403 34,806 40,607 81,214 121,821 and 243,642, with no remainder.
Since 243,642 cannot be divided by just 1 and 243,642, it is not a prime number.