904605 has 16 divisors (see below), whose sum is σ = 1559040. Its totient is φ = 445248.

The previous prime is 904601. The next prime is 904619. The reversal of 904605 is 506409.

904605 = 10² + 11² + ... + 139².

It is not a de Polignac number, because 904605 - 2² = 904601 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2125 + ... + 2514.

It is an arithmetic number, because the mean of its divisors is an integer number (97440).

2⁹⁰⁴⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

904605 is a deficient number, since it is larger than the sum of its proper divisors (654435).

904605 is a wasteful number, since it uses less digits than its factorization.

904605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 904605 is about 951.1072494729. The cubic root of 904605 is about 96.7133279815.

The spelling of 904605 in words is "nine hundred four thousand, six hundred five".