Q: Is 542,721 a Prime Number?
A: No, 542,721 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 542721 can be evenly divided by 1 3 180,907 and 542,721, with no remainder.
Since 542,721 cannot be divided by just 1 and 542,721, it is not a prime number.