Q: Is 420,420 a Prime Number?
A: No, 420,420 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 420420 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 13 14 15 20 21 22 26 28 30 33 35 39 42 44 49 52 55 60 65 66 70 77 78 84 91 98 105 110 130 132 140 143 147 154 156 165 182 195 196 210 220 231 245 260 273 286 294 308 330 364 385 390 420 429 455 462 490 539 546 572 588 637 660 715 735 770 780 858 910 924 980 1,001 1,078 1,092 1,155 1,274 1,365 1,430 1,470 1,540 1,617 1,716 1,820 1,911 2,002 2,145 2,156 2,310 2,548 2,695 2,730 2,860 2,940 3,003 3,185 3,234 3,822 4,004 4,290 4,620 5,005 5,390 5,460 6,006 6,370 6,468 7,007 7,644 8,085 8,580 9,555 10,010 10,780 12,012 12,740 14,014 15,015 16,170 19,110 20,020 21,021 28,028 30,030 32,340 35,035 38,220 42,042 60,060 70,070 84,084 105,105 140,140 210,210 and 420,420, with no remainder.
Since 420,420 cannot be divided by just 1 and 420,420, it is not a prime number.