Q: Is 421,860 a Prime Number?
A: No, 421,860 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 421860 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 79 89 158 178 237 267 316 356 395 445 474 534 790 890 948 1,068 1,185 1,335 1,580 1,780 2,370 2,670 4,740 5,340 7,031 14,062 21,093 28,124 35,155 42,186 70,310 84,372 105,465 140,620 210,930 and 421,860, with no remainder.
Since 421,860 cannot be divided by just 1 and 421,860, it is not a prime number.