Q: Is 1,645,628 a Prime Number?
A: No, 1,645,628 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 1645628 can be evenly divided by 1 2 4 19 38 59 76 118 236 367 734 1,121 1,468 2,242 4,484 6,973 13,946 21,653 27,892 43,306 86,612 411,407 822,814 and 1,645,628, with no remainder.
Since 1,645,628 cannot be divided by just 1 and 1,645,628, it is not a prime number.