Q: Is 620,745 a Prime Number?
A: No, 620,745 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 620745 can be evenly divided by 1 3 5 15 29 87 145 435 1,427 4,281 7,135 21,405 41,383 124,149 206,915 and 620,745, with no remainder.
Since 620,745 cannot be divided by just 1 and 620,745, it is not a prime number.