Q: Is 25,420 a Prime Number?
A: No, 25,420 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 25420 can be evenly divided by 1 2 4 5 10 20 31 41 62 82 124 155 164 205 310 410 620 820 1,271 2,542 5,084 6,355 12,710 and 25,420, with no remainder.
Since 25,420 cannot be divided by just 1 and 25,420, it is not a prime number.