201671 has 4 divisors (see below), whose sum is σ = 213552. Its totient is φ = 189792.

The previous prime is 201667. The next prime is 201673. The reversal of 201671 is 176102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201671 - 2² = 201667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 11863 = 201671 / (2 + 0 + 1 + 6 + 7 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5915 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (53388).

2²⁰¹⁶⁷¹ is an apocalyptic number.

201671 is a deficient number, since it is larger than the sum of its proper divisors (11881).

201671 is a wasteful number, since it uses less digits than its factorization.

201671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11880.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 201671 is about 449.0779442369. The cubic root of 201671 is about 58.6427710592.

Adding to 201671 its reverse (176102), we get a palindrome (377773).

The spelling of 201671 in words is "two hundred one thousand, six hundred seventy-one".