Q: Is 2,721,628 a Prime Number?
A: No, 2,721,628 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 2721628 can be evenly divided by 1 2 4 7 13 14 26 28 52 91 182 364 7,477 14,954 29,908 52,339 97,201 104,678 194,402 209,356 388,804 680,407 1,360,814 and 2,721,628, with no remainder.
Since 2,721,628 cannot be divided by just 1 and 2,721,628, it is not a prime number.