Q: Is 42,820 a Prime Number?
A: No, 42,820 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 42820 can be evenly divided by 1 2 4 5 10 20 2,141 4,282 8,564 10,705 21,410 and 42,820, with no remainder.
Since 42,820 cannot be divided by just 1 and 42,820, it is not a prime number.