Q: Is 145,309 a Prime Number?
A: No, 145,309 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 145309 can be evenly divided by 1 331 439 and 145,309, with no remainder.
Since 145,309 cannot be divided by just 1 and 145,309, it is not a prime number.