Q: Is 861,428 a Prime Number?
A: No, 861,428 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 861428 can be evenly divided by 1 2 4 31 62 124 6,947 13,894 27,788 215,357 430,714 and 861,428, with no remainder.
Since 861,428 cannot be divided by just 1 and 861,428, it is not a prime number.