261084 has 12 divisors (see below), whose sum is σ = 609224. Its totient is φ = 87024.

The previous prime is 261077. The next prime is 261089. The reversal of 261084 is 480162.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 261084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261089) by changing a digit.

261084 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10867 + ... + 10890.

2²⁶¹⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

261084 is an abundant number, since it is smaller than the sum of its proper divisors (348140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261084 is a wasteful number, since it uses less digits than its factorization.

261084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21764 (or 21762 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 261084 is about 510.9637951949. The cubic root of 261084 is about 63.9136204468.

The spelling of 261084 in words is "two hundred sixty-one thousand, eighty-four".