Q: Is 25,809 a Prime Number?
A: No, 25,809 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 25809 can be evenly divided by 1 3 7 21 1,229 3,687 8,603 and 25,809, with no remainder.
Since 25,809 cannot be divided by just 1 and 25,809, it is not a prime number.