Q: Is 421,400 a Prime Number?
A: No, 421,400 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 421400 can be evenly divided by 1 2 4 5 7 8 10 14 20 25 28 35 40 43 49 50 56 70 86 98 100 140 172 175 196 200 215 245 280 301 344 350 392 430 490 602 700 860 980 1,075 1,204 1,225 1,400 1,505 1,720 1,960 2,107 2,150 2,408 2,450 3,010 4,214 4,300 4,900 6,020 7,525 8,428 8,600 9,800 10,535 12,040 15,050 16,856 21,070 30,100 42,140 52,675 60,200 84,280 105,350 210,700 and 421,400, with no remainder.
Since 421,400 cannot be divided by just 1 and 421,400, it is not a prime number.