Q: Is 1,421,536 a Prime Number?
A: No, 1,421,536 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 1421536 can be evenly divided by 1 2 4 8 16 31 32 62 124 248 496 992 1,433 2,866 5,732 11,464 22,928 44,423 45,856 88,846 177,692 355,384 710,768 and 1,421,536, with no remainder.
Since 1,421,536 cannot be divided by just 1 and 1,421,536, it is not a prime number.