261592 has 16 divisors (see below), whose sum is σ = 516600. Its totient is φ = 123840.

The previous prime is 261587. The next prime is 261593. The reversal of 261592 is 295162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261593) by changing a digit.

261592 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709 + ... + 1012.

2²⁶¹⁵⁹² is an apocalyptic number.

It is an amenable number.

261592 is a deficient number, since it is larger than the sum of its proper divisors (255008).

261592 is a wasteful number, since it uses less digits than its factorization.

261592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1742 counting only the distinct ones).

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

The square root of 261592 is about 511.4606534231. The cubic root of 261592 is about 63.9550465572.

The spelling of 261592 in words is "two hundred sixty-one thousand, five hundred ninety-two".