Q: Is 820,542 a Prime Number?
A: No, 820,542 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 820542 can be evenly divided by 1 2 3 6 163 326 489 839 978 1,678 2,517 5,034 136,757 273,514 410,271 and 820,542, with no remainder.
Since 820,542 cannot be divided by just 1 and 820,542, it is not a prime number.