172406 has 16 divisors (see below), whose sum is σ = 294000. Its totient is φ = 75168.

The previous prime is 172399. The next prime is 172411. The reversal of 172406 is 604271.

172406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

172406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (18375).

2¹⁷²⁴⁰⁶ is an apocalyptic number.

172406 is a deficient number, since it is larger than the sum of its proper divisors (121594).

172406 is a wasteful number, since it uses less digits than its factorization.

172406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 172406 is about 415.2180150234. The cubic root of 172406 is about 55.6567007789.

Adding to 172406 its reverse (604271), we get a palindrome (776677).

The spelling of 172406 in words is "one hundred seventy-two thousand, four hundred six".