Q: Is 1,421,308 a Prime Number?
A: No, 1,421,308 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 1421308 can be evenly divided by 1 2 4 7 14 23 28 46 92 161 322 644 2,207 4,414 8,828 15,449 30,898 50,761 61,796 101,522 203,044 355,327 710,654 and 1,421,308, with no remainder.
Since 1,421,308 cannot be divided by just 1 and 1,421,308, it is not a prime number.