Q: Is 542,668 a Prime Number?
A: No, 542,668 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 542668 can be evenly divided by 1 2 4 7 14 28 19,381 38,762 77,524 135,667 271,334 and 542,668, with no remainder.
Since 542,668 cannot be divided by just 1 and 542,668, it is not a prime number.