Q: Is 853,821 a Prime Number?
A: No, 853,821 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 853821 can be evenly divided by 1 3 9 27 81 83 127 249 381 747 1,143 2,241 3,429 6,723 10,287 10,541 31,623 94,869 284,607 and 853,821, with no remainder.
Since 853,821 cannot be divided by just 1 and 853,821, it is not a prime number.