Q: Is 400,870 a Prime Number?
A: No, 400,870 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 400870 can be evenly divided by 1 2 5 10 40,087 80,174 200,435 and 400,870, with no remainder.
Since 400,870 cannot be divided by just 1 and 400,870, it is not a prime number.