904520 has 16 divisors (see below), whose sum is σ = 2035260. Its totient is φ = 361792.

The previous prime is 904517. The next prime is 904523. The reversal of 904520 is 25409.

904520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (904517) and next prime (904523).

It can be written as a sum of positive squares in 2 ways, for example, as 894916 + 9604 = 946^2 + 98^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 904492 and 904501.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 904520.

It is not an unprimeable number, because it can be changed into a prime (904523) 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, 11267 + ... + 11346.

2⁹⁰⁴⁵²⁰ is an apocalyptic number.

It is an amenable number.

904520 is an abundant number, since it is smaller than the sum of its proper divisors (1130740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

904520 is a wasteful number, since it uses less digits than its factorization.

904520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22624 (or 22620 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 904520 is about 951.0625636623. The cubic root of 904520 is about 96.7102987070.

Adding to 904520 its reverse (25409), we get a palindrome (929929).

The spelling of 904520 in words is "nine hundred four thousand, five hundred twenty".