Q: Is 400,785 a Prime Number?
A: No, 400,785 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 400785 can be evenly divided by 1 3 5 7 11 15 21 33 35 55 77 105 165 231 347 385 1,041 1,155 1,735 2,429 3,817 5,205 7,287 11,451 12,145 19,085 26,719 36,435 57,255 80,157 133,595 and 400,785, with no remainder.
Since 400,785 cannot be divided by just 1 and 400,785, it is not a prime number.