Q: Is 531,720 a Prime Number?
A: No, 531,720 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 531720 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 211 252 280 315 360 420 422 504 630 633 840 844 1,055 1,260 1,266 1,477 1,688 1,899 2,110 2,520 2,532 2,954 3,165 3,798 4,220 4,431 5,064 5,908 6,330 7,385 7,596 8,440 8,862 9,495 11,816 12,660 13,293 14,770 15,192 17,724 18,990 22,155 25,320 26,586 29,540 35,448 37,980 44,310 53,172 59,080 66,465 75,960 88,620 106,344 132,930 177,240 265,860 and 531,720, with no remainder.
Since 531,720 cannot be divided by just 1 and 531,720, it is not a prime number.