Q: Is 1,721,248 a Prime Number?
A: No, 1,721,248 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 1721248 can be evenly divided by 1 2 4 8 16 19 32 38 76 149 152 298 304 361 596 608 722 1,192 1,444 2,384 2,831 2,888 4,768 5,662 5,776 11,324 11,552 22,648 45,296 53,789 90,592 107,578 215,156 430,312 860,624 and 1,721,248, with no remainder.
Since 1,721,248 cannot be divided by just 1 and 1,721,248, it is not a prime number.