Q: Is 4,000,405 a Prime Number?
A: No, 4,000,405 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 4000405 can be evenly divided by 1 5 29 47 145 235 587 1,363 2,935 6,815 17,023 27,589 85,115 137,945 800,081 and 4,000,405, with no remainder.
Since 4,000,405 cannot be divided by just 1 and 4,000,405, it is not a prime number.