Q: Is 157,509 a Prime Number?
A: No, 157,509 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 157509 can be evenly divided by 1 3 9 11 33 37 43 99 111 129 333 387 407 473 1,221 1,419 1,591 3,663 4,257 4,773 14,319 17,501 52,503 and 157,509, with no remainder.
Since 157,509 cannot be divided by just 1 and 157,509, it is not a prime number.