Q: Is 521,442 a Prime Number?
A: No, 521,442 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 521442 can be evenly divided by 1 2 3 6 9 18 59 118 177 354 491 531 982 1,062 1,473 2,946 4,419 8,838 28,969 57,938 86,907 173,814 260,721 and 521,442, with no remainder.
Since 521,442 cannot be divided by just 1 and 521,442, it is not a prime number.