Q: Is 642,200 a Prime Number?
A: No, 642,200 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 642200 can be evenly divided by 1 2 4 5 8 10 13 19 20 25 26 38 40 50 52 65 76 95 100 104 130 152 169 190 200 247 260 325 338 380 475 494 520 650 676 760 845 950 988 1,235 1,300 1,352 1,690 1,900 1,976 2,470 2,600 3,211 3,380 3,800 4,225 4,940 6,175 6,422 6,760 8,450 9,880 12,350 12,844 16,055 16,900 24,700 25,688 32,110 33,800 49,400 64,220 80,275 128,440 160,550 321,100 and 642,200, with no remainder.
Since 642,200 cannot be divided by just 1 and 642,200, it is not a prime number.