Q: Is 1,666,425 a Prime Number?
A: No, 1,666,425 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 1666425 can be evenly divided by 1 3 5 15 17 25 51 75 85 255 425 1,275 1,307 3,921 6,535 19,605 22,219 32,675 66,657 98,025 111,095 333,285 555,475 and 1,666,425, with no remainder.
Since 1,666,425 cannot be divided by just 1 and 1,666,425, it is not a prime number.