Q: Is 521,872 a Prime Number?
A: No, 521,872 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 521872 can be evenly divided by 1 2 4 8 13 16 26 52 104 169 193 208 338 386 676 772 1,352 1,544 2,509 2,704 3,088 5,018 10,036 20,072 32,617 40,144 65,234 130,468 260,936 and 521,872, with no remainder.
Since 521,872 cannot be divided by just 1 and 521,872, it is not a prime number.