404057 has 4 divisors (see below), whose sum is σ = 418020. Its totient is φ = 390096.

The previous prime is 404051. The next prime is 404081. The reversal of 404057 is 750404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 63001 = 584^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 404057 - 2⁶ = 403993 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404057.

It is not an unprimeable number, because it can be changed into a prime (404051) 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, 6938 + ... + 6995.

It is an arithmetic number, because the mean of its divisors is an integer number (104505).

2⁴⁰⁴⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

404057 is a deficient number, since it is larger than the sum of its proper divisors (13963).

404057 is a wasteful number, since it uses less digits than its factorization.

404057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13962.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 404057 is about 635.6547805216. The cubic root of 404057 is about 73.9288944441.

The spelling of 404057 in words is "four hundred four thousand, fifty-seven".