525404 has 12 divisors (see below), whose sum is σ = 1003128. Its totient is φ = 238800.

The previous prime is 525397. The next prime is 525409. The reversal of 525404 is 404525.

It is a happy number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525409) 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, 5927 + ... + 6014.

It is an arithmetic number, because the mean of its divisors is an integer number (83594).

2⁵²⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

525404 is a deficient number, since it is larger than the sum of its proper divisors (477724).

525404 is a wasteful number, since it uses less digits than its factorization.

525404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11956 (or 11954 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 525404 is about 724.8475701829. The cubic root of 525404 is about 80.6921198582.

Adding to 525404 its reverse (404525), we get a palindrome (929929).

It can be divided in two parts, 525 and 404, that added together give a palindrome (929).

The spelling of 525404 in words is "five hundred twenty-five thousand, four hundred four".