Q: Is 400,155 a Prime Number?
A: No, 400,155 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 400155 can be evenly divided by 1 3 5 7 15 21 35 37 103 105 111 185 259 309 515 555 721 777 1,295 1,545 2,163 3,605 3,811 3,885 10,815 11,433 19,055 26,677 57,165 80,031 133,385 and 400,155, with no remainder.
Since 400,155 cannot be divided by just 1 and 400,155, it is not a prime number.