Q: Is 865,428 a Prime Number?
A: No, 865,428 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 865428 can be evenly divided by 1 2 3 4 6 12 41 82 123 164 246 492 1,759 3,518 5,277 7,036 10,554 21,108 72,119 144,238 216,357 288,476 432,714 and 865,428, with no remainder.
Since 865,428 cannot be divided by just 1 and 865,428, it is not a prime number.