Q: Is 645,824 a Prime Number?
A: No, 645,824 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 645824 can be evenly divided by 1 2 4 8 16 32 64 10,091 20,182 40,364 80,728 161,456 322,912 and 645,824, with no remainder.
Since 645,824 cannot be divided by just 1 and 645,824, it is not a prime number.