Q: Is 777,420 a Prime Number?
A: No, 777,420 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 777420 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 84 90 105 126 140 180 210 252 315 420 617 630 1,234 1,260 1,851 2,468 3,085 3,702 4,319 5,553 6,170 7,404 8,638 9,255 11,106 12,340 12,957 17,276 18,510 21,595 22,212 25,914 27,765 37,020 38,871 43,190 51,828 55,530 64,785 77,742 86,380 111,060 129,570 155,484 194,355 259,140 388,710 and 777,420, with no remainder.
Since 777,420 cannot be divided by just 1 and 777,420, it is not a prime number.