Q: Is 145,509 a Prime Number?
A: No, 145,509 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 145509 can be evenly divided by 1 3 7 13 21 39 41 91 123 169 273 287 507 533 861 1,183 1,599 3,549 3,731 6,929 11,193 20,787 48,503 and 145,509, with no remainder.
Since 145,509 cannot be divided by just 1 and 145,509, it is not a prime number.