Q: Is 620,505 a Prime Number?
A: No, 620,505 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 620505 can be evenly divided by 1 3 5 9 15 45 13,789 41,367 68,945 124,101 206,835 and 620,505, with no remainder.
Since 620,505 cannot be divided by just 1 and 620,505, it is not a prime number.