Q: Is 542,021 a Prime Number?
A: Yes, 542,021 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 542021 can be evenly divided by 1 and 542,021, with no remainder.
Since 542,021 can be divided by just 1 and 542,021, it is a prime number.