404155 has 4 divisors (see below), whose sum is σ = 484992. Its totient is φ = 323320.

The previous prime is 404123. The next prime is 404161. The reversal of 404155 is 551404.

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

It is not a de Polignac number, because 404155 - 2⁵ = 404123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 40411 + ... + 40420.

It is an arithmetic number, because the mean of its divisors is an integer number (121248).

2⁴⁰⁴¹⁵⁵ is an apocalyptic number.

404155 is a deficient number, since it is larger than the sum of its proper divisors (80837).

404155 is an equidigital number, since it uses as much as digits as its factorization.

404155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80836.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 404155 is about 635.7318617153. The cubic root of 404155 is about 73.9348708666.

Adding to 404155 its reverse (551404), we get a palindrome (955559).

It can be divided in two parts, 4041 and 55, that added together give a 12-th power (4096 = 2¹²).

The spelling of 404155 in words is "four hundred four thousand, one hundred fifty-five".