Problem 50182. Compute the Euler totient function

The Euler totient function phi(n) gives the number of integers smaller than n that are relatively prime to n---that is, that share no common factors with n other than 1. For example, phi(12) = 4 because 1, 5, 7, and 11 share no common factors other than 1. If p is a prime number, then phi(p) = p-1 because all numbers smaller than p are relatively prime to p.
Write a function to compute the Euler totient function.
Note: I now realize that Cody Problem 656 also deals with the totient function. Apologies to Freddy.
Solve

Solution Stats

50.0% Correct | 50.0% Incorrect
Last Solution submitted on Jul 30, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers11

Suggested Problems

More from this Author314

Problem Tags

number theory primes

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!