Q: Is 561,428 a Prime Number?
A: No, 561,428 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 561428 can be evenly divided by 1 2 4 7 14 28 20,051 40,102 80,204 140,357 280,714 and 561,428, with no remainder.
Since 561,428 cannot be divided by just 1 and 561,428, it is not a prime number.