266265 has 24 divisors (see below), whose sum is σ = 473928. Its totient is φ = 138240.

The previous prime is 266261. The next prime is 266269. The reversal of 266265 is 562662.

266265 = 86² + 87² + ... + 112².

It is an interprime number because it is at equal distance from previous prime (266261) and next prime (266269).

It can be written as a sum of positive squares in 4 ways, for example, as 9 + 266256 = 3^2 + 516^2 .

It is not a de Polignac number, because 266265 - 2² = 266261 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266261) 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 in 23 ways as a sum of consecutive naturals, for example, 2697 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (19747).

2²⁶⁶²⁶⁵ is an apocalyptic number.

It is an amenable number.

266265 is a deficient number, since it is larger than the sum of its proper divisors (207663).

266265 is a wasteful number, since it uses less digits than its factorization.

266265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 166 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 266265 is about 516.0087208565. The cubic root of 266265 is about 64.3336256590. Note that the first 3 decimals are identical.

The spelling of 266265 in words is "two hundred sixty-six thousand, two hundred sixty-five".