Q: Is 521,742 a Prime Number?
A: No, 521,742 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 521742 can be evenly divided by 1 2 3 6 13 26 39 78 6,689 13,378 20,067 40,134 86,957 173,914 260,871 and 521,742, with no remainder.
Since 521,742 cannot be divided by just 1 and 521,742, it is not a prime number.