Q: Is 345,721 a Prime Number?
A: No, 345,721 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 345721 can be evenly divided by 1 227 1,523 and 345,721, with no remainder.
Since 345,721 cannot be divided by just 1 and 345,721, it is not a prime number.