Q: Is 6,435 a Prime Number?
A: No, 6,435 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 6435 can be evenly divided by 1 3 5 9 11 13 15 33 39 45 55 65 99 117 143 165 195 429 495 585 715 1,287 2,145 and 6,435, with no remainder.
Since 6,435 cannot be divided by just 1 and 6,435, it is not a prime number.