Q: Is 521,748 a Prime Number?
A: No, 521,748 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 521748 can be evenly divided by 1 2 3 4 6 9 12 18 27 36 54 108 4,831 9,662 14,493 19,324 28,986 43,479 57,972 86,958 130,437 173,916 260,874 and 521,748, with no remainder.
Since 521,748 cannot be divided by just 1 and 521,748, it is not a prime number.