Q: Is 1,643,071 a Prime Number?
A: No, 1,643,071 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 1643071 can be evenly divided by 1 617 2,663 and 1,643,071, with no remainder.
Since 1,643,071 cannot be divided by just 1 and 1,643,071, it is not a prime number.