Q: Is 3,721,545 a Prime Number?
A: No, 3,721,545 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 3721545 can be evenly divided by 1 3 5 9 15 27 45 81 135 243 405 729 1,021 1,215 3,063 3,645 5,105 9,189 15,315 27,567 45,945 82,701 137,835 248,103 413,505 744,309 1,240,515 and 3,721,545, with no remainder.
Since 3,721,545 cannot be divided by just 1 and 3,721,545, it is not a prime number.