Q: Is 400,775 a Prime Number?
A: No, 400,775 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 400775 can be evenly divided by 1 5 17 23 25 41 85 115 205 391 425 575 697 943 1,025 1,955 3,485 4,715 9,775 16,031 17,425 23,575 80,155 and 400,775, with no remainder.
Since 400,775 cannot be divided by just 1 and 400,775, it is not a prime number.