Q: Is 556,428 a Prime Number?
A: No, 556,428 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 556428 can be evenly divided by 1 2 3 4 6 12 89 178 267 356 521 534 1,042 1,068 1,563 2,084 3,126 6,252 46,369 92,738 139,107 185,476 278,214 and 556,428, with no remainder.
Since 556,428 cannot be divided by just 1 and 556,428, it is not a prime number.