Q: Is 1,620,428 a Prime Number?
A: No, 1,620,428 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 1620428 can be evenly divided by 1 2 4 193 386 772 2,099 4,198 8,396 405,107 810,214 and 1,620,428, with no remainder.
Since 1,620,428 cannot be divided by just 1 and 1,620,428, it is not a prime number.