Q: Is 1,645,425 a Prime Number?
A: No, 1,645,425 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 1645425 can be evenly divided by 1 3 5 9 15 25 45 71 75 103 213 225 309 355 515 639 927 1,065 1,545 1,775 2,575 3,195 4,635 5,325 7,313 7,725 15,975 21,939 23,175 36,565 65,817 109,695 182,825 329,085 548,475 and 1,645,425, with no remainder.
Since 1,645,425 cannot be divided by just 1 and 1,645,425, it is not a prime number.