Q: Is 42,557 a Prime Number?
A: Yes, 42,557 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 42557 can be evenly divided by 1 and 42,557, with no remainder.
Since 42,557 can be divided by just 1 and 42,557, it is a prime number.