Q: Is 1,521,198 a Prime Number?
A: No, 1,521,198 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 1521198 can be evenly divided by 1 2 3 6 7 9 14 18 21 42 63 126 12,073 24,146 36,219 72,438 84,511 108,657 169,022 217,314 253,533 507,066 760,599 and 1,521,198, with no remainder.
Since 1,521,198 cannot be divided by just 1 and 1,521,198, it is not a prime number.