265291 has 4 divisors (see below), whose sum is σ = 285712. Its totient is φ = 244872.

The previous prime is 265277. The next prime is 265313. The reversal of 265291 is 192562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192562 = 2 ⋅96281.

It is a cyclic number.

It is not a de Polignac number, because 265291 - 2⁷ = 265163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265231) 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 3 ways as a sum of consecutive naturals, for example, 10191 + ... + 10216.

It is an arithmetic number, because the mean of its divisors is an integer number (71428).

2²⁶⁵²⁹¹ is an apocalyptic number.

265291 is a deficient number, since it is larger than the sum of its proper divisors (20421).

265291 is a wasteful number, since it uses less digits than its factorization.

265291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20420.

The product of its digits is 1080, while the sum is 25.

The square root of 265291 is about 515.0640736840. The cubic root of 265291 is about 64.2550854681.

The spelling of 265291 in words is "two hundred sixty-five thousand, two hundred ninety-one".