Q: Is 1,521,423 a Prime Number?
A: No, 1,521,423 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 1521423 can be evenly divided by 1 3 9 27 81 243 729 2,087 6,261 18,783 56,349 169,047 507,141 and 1,521,423, with no remainder.
Since 1,521,423 cannot be divided by just 1 and 1,521,423, it is not a prime number.