261153 has 6 divisors (see below), whose sum is σ = 377234. Its totient is φ = 174096.

The previous prime is 261127. The next prime is 261167. The reversal of 261153 is 351162.

261153 is a `hidden beast` number, since 2 + 611 + 53 = 666.

It can be written as a sum of positive squares in only one way, i.e., 186624 + 74529 = 432^2 + 273^2 .

It is not a de Polignac number, because 261153 - 2⁶ = 261089 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261153.

It is not an unprimeable number, because it can be changed into a prime (261353) 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, 14500 + ... + 14517.

2²⁶¹¹⁵³ is an apocalyptic number.

It is an amenable number.

261153 is a deficient number, since it is larger than the sum of its proper divisors (116081).

261153 is a wasteful number, since it uses less digits than its factorization.

261153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29023 (or 29020 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 261153 is about 511.0313101954. The cubic root of 261153 is about 63.9192503735.

Subtracting 261153 from its reverse (351162), we obtain a palindrome (90009).

It can be divided in two parts, 261 and 153, that added together give a palindrome (414).

The spelling of 261153 in words is "two hundred sixty-one thousand, one hundred fifty-three".