Q: Is 855,428 a Prime Number?
A: No, 855,428 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 855428 can be evenly divided by 1 2 4 7 14 28 137 223 274 446 548 892 959 1,561 1,918 3,122 3,836 6,244 30,551 61,102 122,204 213,857 427,714 and 855,428, with no remainder.
Since 855,428 cannot be divided by just 1 and 855,428, it is not a prime number.