Q: Is 621,020 a Prime Number?
A: No, 621,020 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 621020 can be evenly divided by 1 2 4 5 10 20 31,051 62,102 124,204 155,255 310,510 and 621,020, with no remainder.
Since 621,020 cannot be divided by just 1 and 621,020, it is not a prime number.