265799 has 4 divisors (see below), whose sum is σ = 267960. Its totient is φ = 263640.

The previous prime is 265787. The next prime is 265807. The reversal of 265799 is 997562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997562 = 2 ⋅498781.

It is a cyclic number.

It is not a de Polignac number, because 265799 - 2⁸ = 265543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 265799.

It is not an unprimeable number, because it can be changed into a prime (265709) 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, 884 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (66990).

2²⁶⁵⁷⁹⁹ is an apocalyptic number.

265799 is a deficient number, since it is larger than the sum of its proper divisors (2161).

265799 is a wasteful number, since it uses less digits than its factorization.

265799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160.

The product of its digits is 34020, while the sum is 38.

The square root of 265799 is about 515.5569803620. The cubic root of 265799 is about 64.2960728752.

The spelling of 265799 in words is "two hundred sixty-five thousand, seven hundred ninety-nine".