Q: Is 821,080 a Prime Number?
A: No, 821,080 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 821080 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 1,579 3,158 6,316 7,895 12,632 15,790 20,527 31,580 41,054 63,160 82,108 102,635 164,216 205,270 410,540 and 821,080, with no remainder.
Since 821,080 cannot be divided by just 1 and 821,080, it is not a prime number.