265984 has 18 divisors (see below), whose sum is σ = 531440. Its totient is φ = 132864.

The previous prime is 265961. The next prime is 265987. The reversal of 265984 is 489562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264 + ... + 775.

265984 is a Friedman number, since it can be written as (9+6+4^5)*2^8, using all its digits and the basic arithmetic operations.

2²⁶⁵⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

265984 is a deficient number, since it is larger than the sum of its proper divisors (265456).

265984 is an equidigital number, since it uses as much as digits as its factorization.

265984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1041 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 265984 is about 515.7363667612. The cubic root of 265984 is about 64.3109864188.

The spelling of 265984 in words is "two hundred sixty-five thousand, nine hundred eighty-four".