265537 has 4 divisors (see below), whose sum is σ = 267696. Its totient is φ = 263380.

The previous prime is 265513. The next prime is 265541. The reversal of 265537 is 735562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735562 = 2 ⋅367781.

It is a cyclic number.

It is not a de Polignac number, because 265537 - 2¹¹ = 263489 is a prime.

It is a Duffinian number.

265537 is a lucky number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (265547) 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, 883 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (66924).

2²⁶⁵⁵³⁷ is an apocalyptic number.

It is an amenable number.

265537 is a deficient number, since it is larger than the sum of its proper divisors (2159).

265537 is a wasteful number, since it uses less digits than its factorization.

265537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its digits is 6300, while the sum is 28.

The square root of 265537 is about 515.3028235902. The cubic root of 265537 is about 64.2749402285.

The spelling of 265537 in words is "two hundred sixty-five thousand, five hundred thirty-seven".