Q: Is 1,645,245 a Prime Number?
A: No, 1,645,245 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 1645245 can be evenly divided by 1 3 5 7 9 15 21 27 35 45 63 105 135 189 315 945 1,741 5,223 8,705 12,187 15,669 26,115 36,561 47,007 60,935 78,345 109,683 182,805 235,035 329,049 548,415 and 1,645,245, with no remainder.
Since 1,645,245 cannot be divided by just 1 and 1,645,245, it is not a prime number.