406173 has 4 divisors (see below), whose sum is σ = 541568. Its totient is φ = 270780.

The previous prime is 406171. The next prime is 406177. The reversal of 406173 is 371604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 406173 - 2¹ = 406171 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

406173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406171) 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, 67693 + ... + 67698.

It is an arithmetic number, because the mean of its divisors is an integer number (135392).

2⁴⁰⁶¹⁷³ is an apocalyptic number.

It is an amenable number.

406173 is a deficient number, since it is larger than the sum of its proper divisors (135395).

406173 is a wasteful number, since it uses less digits than its factorization.

406173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135394.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 406173 is about 637.3170325670. The cubic root of 406173 is about 74.0577221900.

Adding to 406173 its reverse (371604), we get a palindrome (777777).

The spelling of 406173 in words is "four hundred six thousand, one hundred seventy-three".