Q: Is 2,725,821 a Prime Number?
A: No, 2,725,821 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 2725821 can be evenly divided by 1 3 7 9 21 49 63 147 343 441 883 1,029 2,649 3,087 6,181 7,947 18,543 43,267 55,629 129,801 302,869 389,403 908,607 and 2,725,821, with no remainder.
Since 2,725,821 cannot be divided by just 1 and 2,725,821, it is not a prime number.