Q: Is 561,536 a Prime Number?
A: No, 561,536 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 561536 can be evenly divided by 1 2 4 8 16 32 41 64 82 107 128 164 214 328 428 656 856 1,312 1,712 2,624 3,424 4,387 5,248 6,848 8,774 13,696 17,548 35,096 70,192 140,384 280,768 and 561,536, with no remainder.
Since 561,536 cannot be divided by just 1 and 561,536, it is not a prime number.