404025 has 12 divisors (see below), whose sum is σ = 668112. Its totient is φ = 215440.

The previous prime is 404021. The next prime is 404029. The reversal of 404025 is 520404.

It is an interprime number because it is at equal distance from previous prime (404021) and next prime (404029).

It is not a de Polignac number, because 404025 - 2² = 404021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

404025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 403995 and 404013.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404025.

It is not an unprimeable number, because it can be changed into a prime (404021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2619 + ... + 2768.

It is an arithmetic number, because the mean of its divisors is an integer number (55676).

2⁴⁰⁴⁰²⁵ is an apocalyptic number.

It is an amenable number.

404025 is a deficient number, since it is larger than the sum of its proper divisors (264087).

404025 is a wasteful number, since it uses less digits than its factorization.

404025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 5395 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 404025 is about 635.6296091278. The cubic root of 404025 is about 73.9269427499.

Adding to 404025 its reverse (520404), we get a palindrome (924429).

The spelling of 404025 in words is "four hundred four thousand, twenty-five".