Q: Is 340,821 a Prime Number?
A: No, 340,821 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 340821 can be evenly divided by 1 3 9 13 27 39 117 351 971 2,913 8,739 12,623 26,217 37,869 113,607 and 340,821, with no remainder.
Since 340,821 cannot be divided by just 1 and 340,821, it is not a prime number.