404031 has 4 divisors (see below), whose sum is σ = 538712. Its totient is φ = 269352.

The previous prime is 404029. The next prime is 404051. The reversal of 404031 is 130404.

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

It is not a de Polignac number, because 404031 - 2¹ = 404029 is a prime.

It is a super-3 number, since 3×404031³ = 197863332758285373, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a Duffinian number.

404031 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 403998 and 404016.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404031.

It is not an unprimeable number, because it can be changed into a prime (404011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67336 + ... + 67341.

It is an arithmetic number, because the mean of its divisors is an integer number (134678).

2⁴⁰⁴⁰³¹ is an apocalyptic number.

404031 is a deficient number, since it is larger than the sum of its proper divisors (134681).

404031 is a wasteful number, since it uses less digits than its factorization.

404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134680.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 404031 is about 635.6343288401. The cubic root of 404031 is about 73.9273087004.

Adding to 404031 its reverse (130404), we get a palindrome (534435).

It can be divided in two parts, 40403 and 1, that added together give a palindrome (40404).

The spelling of 404031 in words is "four hundred four thousand, thirty-one".