Q: Is 521,198 a Prime Number?
A: No, 521,198 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 521198 can be evenly divided by 1 2 421 619 842 1,238 260,599 and 521,198, with no remainder.
Since 521,198 cannot be divided by just 1 and 521,198, it is not a prime number.