Q: Is 400,542 a Prime Number?
A: No, 400,542 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 400542 can be evenly divided by 1 2 3 6 241 277 482 554 723 831 1,446 1,662 66,757 133,514 200,271 and 400,542, with no remainder.
Since 400,542 cannot be divided by just 1 and 400,542, it is not a prime number.