Q: Is 309,540 a Prime Number?
A: No, 309,540 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 309540 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 14 15 20 21 22 28 30 33 35 42 44 55 60 66 67 70 77 84 105 110 132 134 140 154 165 201 210 220 231 268 308 330 335 385 402 420 462 469 660 670 737 770 804 924 938 1,005 1,155 1,340 1,407 1,474 1,540 1,876 2,010 2,211 2,310 2,345 2,814 2,948 3,685 4,020 4,422 4,620 4,690 5,159 5,628 7,035 7,370 8,844 9,380 10,318 11,055 14,070 14,740 15,477 20,636 22,110 25,795 28,140 30,954 44,220 51,590 61,908 77,385 103,180 154,770 and 309,540, with no remainder.
Since 309,540 cannot be divided by just 1 and 309,540, it is not a prime number.