Q: Is 557,861 a Prime Number?
A: Yes, 557,861 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 557861 can be evenly divided by 1 and 557,861, with no remainder.
Since 557,861 can be divided by just 1 and 557,861, it is a prime number.