Q: Is 428,127 a Prime Number?
A: No, 428,127 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 428127 can be evenly divided by 1 3 7 19 21 29 37 57 87 111 133 203 259 399 551 609 703 777 1,073 1,653 2,109 3,219 3,857 4,921 7,511 11,571 14,763 20,387 22,533 61,161 142,709 and 428,127, with no remainder.
Since 428,127 cannot be divided by just 1 and 428,127, it is not a prime number.