Square Root Calculator › Square root of 427
Square Root of 427
√427 ≈ 20.663978
427 is not a perfect square, so √427 is an irrational number that is approximately 20.663978. In simplified radical form, √427 = √427.
√427 lies between √400 = 20 and √441 = 21.
| Number | 427 |
| Square root (decimal) | 20.663978 |
| Simplified radical | √427 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 427 a perfect square?
No, 427 is not a perfect square, so its square root is irrational and approximately 20.663978.
What is the square root of 427 in simplest radical form?
√427 = √427 in simplest radical form.