Q: Is 561,321 a Prime Number?
A: No, 561,321 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 561321 can be evenly divided by 1 3 9 47 141 423 1,327 3,981 11,943 62,369 187,107 and 561,321, with no remainder.
Since 561,321 cannot be divided by just 1 and 561,321, it is not a prime number.