Q: Is 128,625 a Prime Number?
A: No, 128,625 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 128625 can be evenly divided by 1 3 5 7 15 21 25 35 49 75 105 125 147 175 245 343 375 525 735 875 1,029 1,225 1,715 2,625 3,675 5,145 6,125 8,575 18,375 25,725 42,875 and 128,625, with no remainder.
Since 128,625 cannot be divided by just 1 and 128,625, it is not a prime number.