Is 642 a perfect square?

No, 642 is not a perfect square. Its square root is irrational.

What is 25.3377189186 squared?

25.3377189186 squared is approximately 642. (25.3377189186)² ≈ 642

√642 = 25.3377189186. 642 is not a perfect square; the result is irrational.

Instant answer with step-by-step solution

√642 = 25.3377189186

√642 = 25.3377189186

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

We need to find √642 — a number that when multiplied by itself equals 642.
642 is not a perfect square. Its square root is irrational.
It falls between √625 = 25 and √676 = 26.
Using the formula √N = N^(1/2): √642 = 642^0.5 = 25.3377189186
Verification: 25.3377189186 × 25.3377189186 ≈ 642 ✓ (rounded to 10 significant figures)

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