Q: Is 2,121,216 a Prime Number?
A: No, 2,121,216 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 2121216 can be evenly divided by 1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 256 384 512 768 1,381 1,536 2,762 4,143 5,524 8,286 11,048 16,572 22,096 33,144 44,192 66,288 88,384 132,576 176,768 265,152 353,536 530,304 707,072 1,060,608 and 2,121,216, with no remainder.
Since 2,121,216 cannot be divided by just 1 and 2,121,216, it is not a prime number.