Q: Is 209,540 a Prime Number?
A: No, 209,540 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 209540 can be evenly divided by 1 2 4 5 10 20 10,477 20,954 41,908 52,385 104,770 and 209,540, with no remainder.
Since 209,540 cannot be divided by just 1 and 209,540, it is not a prime number.