404271 has 40 divisors (see below), whose sum is σ = 743424. Its totient is φ = 213840.

The previous prime is 404269. The next prime is 404273. The reversal of 404271 is 172404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404269) and next prime (404273).

It is not a de Polignac number, because 404271 - 2¹ = 404269 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404273) 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 39 ways as a sum of consecutive naturals, for example, 13026 + ... + 13056.

2⁴⁰⁴²⁷¹ is an apocalyptic number.

404271 is a deficient number, since it is larger than the sum of its proper divisors (339153).

404271 is a wasteful number, since it uses less digits than its factorization.

404271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 404271 is about 635.8230886025. The cubic root of 404271 is about 73.9419437508.

Adding to 404271 its reverse (172404), we get a palindrome (576675).

The spelling of 404271 in words is "four hundred four thousand, two hundred seventy-one", and thus it is an iban number.