Infolity
  1. Home
  2. Calculators
  3. Square Root

What is the Square Root of 18421?

The square root of 18421 is 135.7239846158. Calculate another value or review the exact form, nearby perfect powers, and verification.

Answer

Square Root√18421 = 135.7239846158
CalculatedNon-perfect squareIrrational
Exact form√18421
Perfect squareNo
Number typeIrrational
Verification135.72398461582 ≈ 18421

On this page

How the answer is calculated

We solve x2 = 18421. The resulting value is x = 135.7239846158.

Verification: 135.72398461582 ≈ 18421.

Simplified radical form

The square root of 18421 in simplified radical form is 13√109.

This is equivalent to √18421, with perfect-square factors moved outside the radical.

Nearest Perfect squares

PositionBaseValue
Lower or equal13518225
Upper or equal13618496

Nearby square roots

NumberSquare root
√18418135.7129323241
√18419135.7166165213
√18420135.7203006186
√18421135.7239846158
√18422135.7276685131
√18423135.7313523104
√18424135.7350360077

Number properties

Is 18421 a perfect square?

No. Its square root is not a whole number.

Is the square root rational or irrational?

√18421 is irrational because 18421 is not a perfect square.

Visual guide

Square Root function graph

See how the result changes as the input moves across positive and negative values. Square roots are shown for non-negative inputs; cube roots continue through negative inputs.

Common questions

Frequently asked questions

It asks for the number that, when raised to the power of 2, equals 18421.