Q: Is 256,842 a Prime Number?
A: No, 256,842 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 256842 can be evenly divided by 1 2 3 6 9 18 19 38 57 114 171 342 751 1,502 2,253 4,506 6,759 13,518 14,269 28,538 42,807 85,614 128,421 and 256,842, with no remainder.
Since 256,842 cannot be divided by just 1 and 256,842, it is not a prime number.