Q: Is 1,821,125 a Prime Number?
A: No, 1,821,125 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 1821125 can be evenly divided by 1 5 17 25 85 125 425 857 2,125 4,285 14,569 21,425 72,845 107,125 364,225 and 1,821,125, with no remainder.
Since 1,821,125 cannot be divided by just 1 and 1,821,125, it is not a prime number.