Q: Is 421,824 a Prime Number?
A: No, 421,824 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 421824 can be evenly divided by 1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 64 78 96 104 156 169 192 208 312 338 416 507 624 676 832 1,014 1,248 1,352 2,028 2,197 2,496 2,704 4,056 4,394 5,408 6,591 8,112 8,788 10,816 13,182 16,224 17,576 26,364 32,448 35,152 52,728 70,304 105,456 140,608 210,912 and 421,824, with no remainder.
Since 421,824 cannot be divided by just 1 and 421,824, it is not a prime number.