√42 = 6.4807406984. 42 is not a perfect square; the result is irrational.

Is 42 a perfect square?

No, 42 is not a perfect square. Its square root is irrational.

What is 6.4807406984 squared?

6.4807406984 squared is approximately 42. (6.4807406984)² ≈ 42

Instant answer with step-by-step solution

√42 = 6.4807406984

√42 = 6.4807406984

⚠ 42 is not a perfect square — result rounded to 10 significant figures

We need to find √42 — a number that when multiplied by itself equals 42.
42 is not a perfect square. Its square root is irrational.
It falls between √36 = 6 and √49 = 7.
Using the formula √N = N^(1/2): √42 = 42^0.5 = 6.4807406984
Verification: 6.4807406984 × 6.4807406984 ≈ 42 ✓ (rounded to 10 significant figures)

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