Q: Is 511,861 a Prime Number?
A: No, 511,861 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 511861 can be evenly divided by 1 7 83 581 881 6,167 73,123 and 511,861, with no remainder.
Since 511,861 cannot be divided by just 1 and 511,861, it is not a prime number.