128 squared

128² = 128 × 128 = 16,384

To square a number, multiply it by itself. 128 squared is written 128² or 128^2, and the answer is 16,384.

How to work out 128 squared

Direct: 128 × 128 = 16,384.
From the previous square: 127² = 16,129, and 128² = 16,129 + (2 × 128 − 1) = 16,129 + 255 = 16,384.
Split the number: 128 = 120 + 8, so 128² = 120² + 2 × 120 × 8 + 8² = 14,400 + 1,920 + 64 = 16,384.

Related

128 cubed = 2,097,152
The square root of 16,384 is 128, so 16,384 is a perfect square.

Squares near 128

Number	Squared
124	15,376
125	15,625
126	15,876
127	16,129
129	16,641
130	16,900
131	17,161
132	17,424

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