Find the square root of number by using the method of prime factorisation:

Resolving into prime factors:$4096=2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2$

$\therefore \sqrt{4096}=2 \times 2 \times 2 \times 2 \times 2 \times 2=64$