Q: Is 1,591 a Prime Number?
A: No, 1,591 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 1591 can be evenly divided by 1 37 43 and 1,591, with no remainder.
Since 1,591 cannot be divided by just 1 and 1,591, it is not a prime number.