261136 has 20 divisors (see below), whose sum is σ = 533200. Its totient is φ = 123552.

The previous prime is 261127. The next prime is 261167. The reversal of 261136 is 631162.

261136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

261136 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, 126 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (26660).

2²⁶¹¹³⁶ is an apocalyptic number.

It is an amenable number.

261136 is an abundant number, since it is smaller than the sum of its proper divisors (272064).

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

261136 is a wasteful number, since it uses less digits than its factorization.

261136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 261136 is about 511.0146768929. The cubic root of 261136 is about 63.9178633822.

Adding to 261136 its reverse (631162), we get a palindrome (892298).

The spelling of 261136 in words is "two hundred sixty-one thousand, one hundred thirty-six".