Q: Is 771,420 a Prime Number?
A: No, 771,420 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 771420 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 23 26 30 39 43 46 52 60 65 69 78 86 92 115 129 130 138 156 172 195 215 230 258 260 276 299 345 390 430 460 516 559 598 645 690 780 860 897 989 1,118 1,196 1,290 1,380 1,495 1,677 1,794 1,978 2,236 2,580 2,795 2,967 2,990 3,354 3,588 3,956 4,485 4,945 5,590 5,934 5,980 6,708 8,385 8,970 9,890 11,180 11,868 12,857 14,835 16,770 17,940 19,780 25,714 29,670 33,540 38,571 51,428 59,340 64,285 77,142 128,570 154,284 192,855 257,140 385,710 and 771,420, with no remainder.
Since 771,420 cannot be divided by just 1 and 771,420, it is not a prime number.