Q: Is 421,800 a Prime Number?
A: No, 421,800 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 421800 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 19 20 24 25 30 37 38 40 50 57 60 74 75 76 95 100 111 114 120 148 150 152 185 190 200 222 228 285 296 300 370 380 444 456 475 555 570 600 703 740 760 888 925 950 1,110 1,140 1,406 1,425 1,480 1,850 1,900 2,109 2,220 2,280 2,775 2,812 2,850 3,515 3,700 3,800 4,218 4,440 5,550 5,624 5,700 7,030 7,400 8,436 10,545 11,100 11,400 14,060 16,872 17,575 21,090 22,200 28,120 35,150 42,180 52,725 70,300 84,360 105,450 140,600 210,900 and 421,800, with no remainder.
Since 421,800 cannot be divided by just 1 and 421,800, it is not a prime number.