Q: Is 4,521,645 a Prime Number?
A: No, 4,521,645 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 4521645 can be evenly divided by 1 3 5 9 15 45 89 267 445 801 1,129 1,335 3,387 4,005 5,645 10,161 16,935 50,805 100,481 301,443 502,405 904,329 1,507,215 and 4,521,645, with no remainder.
Since 4,521,645 cannot be divided by just 1 and 4,521,645, it is not a prime number.