Q: Is 1,521,564 a Prime Number?
A: No, 1,521,564 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 1521564 can be evenly divided by 1 2 3 4 6 11 12 22 33 44 66 132 11,527 23,054 34,581 46,108 69,162 126,797 138,324 253,594 380,391 507,188 760,782 and 1,521,564, with no remainder.
Since 1,521,564 cannot be divided by just 1 and 1,521,564, it is not a prime number.