Q: Is 655,521 a Prime Number?
A: No, 655,521 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 655521 can be evenly divided by 1 3 353 619 1,059 1,857 218,507 and 655,521, with no remainder.
Since 655,521 cannot be divided by just 1 and 655,521, it is not a prime number.