265897 has 4 divisors (see below), whose sum is σ = 281556. Its totient is φ = 250240.

The previous prime is 265891. The next prime is 265921. The reversal of 265897 is 798562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798562 = 2 ⋅399281.

It can be written as a sum of positive squares in 2 ways, for example, as 246016 + 19881 = 496^2 + 141^2 .

It is not a de Polignac number, because 265897 - 2¹¹ = 263849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265891) 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, 7804 + ... + 7837.

It is an arithmetic number, because the mean of its divisors is an integer number (70389).

2²⁶⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

265897 is a deficient number, since it is larger than the sum of its proper divisors (15659).

265897 is a wasteful number, since it uses less digits than its factorization.

265897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15658.

The product of its digits is 30240, while the sum is 37.

The square root of 265897 is about 515.6520144438. The cubic root of 265897 is about 64.3039738842.

It can be divided in two parts, 265 and 897, that multiplied together give a triangular number (237705 = T₆₈₉).

The spelling of 265897 in words is "two hundred sixty-five thousand, eight hundred ninety-seven".