Q: Is 42,578 a Prime Number?
A: No, 42,578 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 42578 can be evenly divided by 1 2 61 122 349 698 21,289 and 42,578, with no remainder.
Since 42,578 cannot be divided by just 1 and 42,578, it is not a prime number.