264861 has 6 divisors (see below), whose sum is σ = 382590. Its totient is φ = 176568.

The previous prime is 264839. The next prime is 264871. The reversal of 264861 is 168462.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 4761 = 510^2 + 69^2 .

It is not a de Polignac number, because 264861 - 2⁵ = 264829 is a prime.

It is a Curzon number.

264861 is a lucky number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14706 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (63765).

2²⁶⁴⁸⁶¹ is an apocalyptic number.

It is an amenable number.

264861 is a deficient number, since it is larger than the sum of its proper divisors (117729).

264861 is a wasteful number, since it uses less digits than its factorization.

264861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29435 (or 29432 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 264861 is about 514.6464806059. The cubic root of 264861 is about 64.2203504938.

The spelling of 264861 in words is "two hundred sixty-four thousand, eight hundred sixty-one".