Q: Is 556,243 a Prime Number?
A: Yes, 556,243 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 556243 can be evenly divided by 1 and 556,243, with no remainder.
Since 556,243 can be divided by just 1 and 556,243, it is a prime number.