Q: Is 2,721,159 a Prime Number?
A: No, 2,721,159 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 2721159 can be evenly divided by 1 3 7 9 21 47 63 141 329 423 919 987 2,757 2,961 6,433 8,271 19,299 43,193 57,897 129,579 302,351 388,737 907,053 and 2,721,159, with no remainder.
Since 2,721,159 cannot be divided by just 1 and 2,721,159, it is not a prime number.