Q: Is 1,721,120 a Prime Number?
A: No, 1,721,120 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 1721120 can be evenly divided by 1 2 4 5 8 10 16 20 31 32 40 62 80 124 155 160 248 310 347 496 620 694 992 1,240 1,388 1,735 2,480 2,776 3,470 4,960 5,552 6,940 10,757 11,104 13,880 21,514 27,760 43,028 53,785 55,520 86,056 107,570 172,112 215,140 344,224 430,280 860,560 and 1,721,120, with no remainder.
Since 1,721,120 cannot be divided by just 1 and 1,721,120, it is not a prime number.