Q: Is 1,355,478 a Prime Number?
A: No, 1,355,478 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 1355478 can be evenly divided by 1 2 3 6 17 34 51 97 102 137 194 274 291 411 582 822 1,649 2,329 3,298 4,658 4,947 6,987 9,894 13,289 13,974 26,578 39,867 79,734 225,913 451,826 677,739 and 1,355,478, with no remainder.
Since 1,355,478 cannot be divided by just 1 and 1,355,478, it is not a prime number.