√401 = 20.0249843945. 401 is not a perfect square; the result is irrational.

Is 401 a perfect square?

No, 401 is not a perfect square. Its square root is irrational.

What is 20.0249843945 squared?

20.0249843945 squared is approximately 401. (20.0249843945)² ≈ 401

Instant answer with step-by-step solution

√401 = 20.0249843945

√401 = 20.0249843945

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

We need to find √401 — a number that when multiplied by itself equals 401.
401 is not a perfect square. Its square root is irrational.
It falls between √400 = 20 and √441 = 21.
Using the formula √N = N^(1/2): √401 = 401^0.5 = 20.0249843945
Verification: 20.0249843945 × 20.0249843945 ≈ 401 ✓ (rounded to 10 significant figures)

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