Q: Is 1,431,243 a Prime Number?
A: No, 1,431,243 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 1431243 can be evenly divided by 1 3 9 11 27 33 61 79 99 183 237 297 549 671 711 869 1,647 2,013 2,133 2,607 4,819 6,039 7,821 14,457 18,117 23,463 43,371 53,009 130,113 159,027 477,081 and 1,431,243, with no remainder.
Since 1,431,243 cannot be divided by just 1 and 1,431,243, it is not a prime number.