Q: Is 145,905 a Prime Number?
A: No, 145,905 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 145905 can be evenly divided by 1 3 5 15 71 137 213 355 411 685 1,065 2,055 9,727 29,181 48,635 and 145,905, with no remainder.
Since 145,905 cannot be divided by just 1 and 145,905, it is not a prime number.