Q: Is 10,420 a Prime Number?
A: No, 10,420 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 10420 can be evenly divided by 1 2 4 5 10 20 521 1,042 2,084 2,605 5,210 and 10,420, with no remainder.
Since 10,420 cannot be divided by just 1 and 10,420, it is not a prime number.