Q: Is 642,142 a Prime Number?
A: No, 642,142 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 642142 can be evenly divided by 1 2 41 82 191 382 1,681 3,362 7,831 15,662 321,071 and 642,142, with no remainder.
Since 642,142 cannot be divided by just 1 and 642,142, it is not a prime number.