265804 has 24 divisors (see below), whose sum is σ = 580608. Its totient is φ = 103440.

The previous prime is 265787. The next prime is 265807. The reversal of 265804 is 408562.

It is not an unprimeable number, because it can be changed into a prime (265807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 739.

It is an arithmetic number, because the mean of its divisors is an integer number (24192).

2²⁶⁵⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

265804 is an abundant number, since it is smaller than the sum of its proper divisors (314804).

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

265804 is a wasteful number, since it uses less digits than its factorization.

265804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 265804 is about 515.5618294637. The cubic root of 265804 is about 64.2964760349.

The spelling of 265804 in words is "two hundred sixty-five thousand, eight hundred four".