Q: Is 1,604,420 a Prime Number?
A: No, 1,604,420 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 1604420 can be evenly divided by 1 2 4 5 10 20 80,221 160,442 320,884 401,105 802,210 and 1,604,420, with no remainder.
Since 1,604,420 cannot be divided by just 1 and 1,604,420, it is not a prime number.