Q: Is 431,641 a Prime Number?
A: No, 431,641 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 431641 can be evenly divided by 1 7 23 49 161 383 1,127 2,681 8,809 18,767 61,663 and 431,641, with no remainder.
Since 431,641 cannot be divided by just 1 and 431,641, it is not a prime number.