Q: Is 672,840 a Prime Number?
A: No, 672,840 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 672840 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 27 28 30 35 36 40 42 45 54 56 60 63 70 72 84 89 90 105 108 120 126 135 140 168 178 180 189 210 216 252 267 270 280 315 356 360 378 420 445 504 534 540 623 630 712 756 801 840 890 945 1,068 1,080 1,246 1,260 1,335 1,512 1,602 1,780 1,869 1,890 2,136 2,403 2,492 2,520 2,670 3,115 3,204 3,560 3,738 3,780 4,005 4,806 4,984 5,340 5,607 6,230 6,408 7,476 7,560 8,010 9,345 9,612 10,680 11,214 12,015 12,460 14,952 16,020 16,821 18,690 19,224 22,428 24,030 24,920 28,035 32,040 33,642 37,380 44,856 48,060 56,070 67,284 74,760 84,105 96,120 112,140 134,568 168,210 224,280 336,420 and 672,840, with no remainder.
Since 672,840 cannot be divided by just 1 and 672,840, it is not a prime number.