Q: Is 642,742 a Prime Number?
A: No, 642,742 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 642742 can be evenly divided by 1 2 321,371 and 642,742, with no remainder.
Since 642,742 cannot be divided by just 1 and 642,742, it is not a prime number.