Euler totient φ(n)

Client

Number-theory totient for RSA homework.

About Euler totient φ(n)

Count integers ≤ n coprime to n. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

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Nearby workflows on Toolcore

  • GCD of two numbers — Greatest common divisor (Euclidean algorithm). when units or numeric output should be checked on a related calculator.
  • Modular inverse calculator — Compute the modular multiplicative inverse with the extended Euclidean algorithm—in your browser. when units or numeric output should be checked on a related calculator.
  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.
  • Units tools — Data size (binary KB/MB/…), length/temperature/weight, speed, volume, and area (acres, ha, sq ft)—focused routes from this index. when units or numeric output should be checked on a related calculator.

Common use cases

  • Euler totient φ(n) for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.