113261 has 4 divisors (see below), whose sum is σ = 115452. Its totient is φ = 111072.

The previous prime is 113233. The next prime is 113279. The reversal of 113261 is 162311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162311 = 23 ⋅7057.

It can be written as a sum of positive squares in 2 ways, for example, as 37636 + 75625 = 194^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 113261 - 2¹⁰ = 112237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (28863).

2¹¹³²⁶¹ is an apocalyptic number.

It is an amenable number.

113261 is a deficient number, since it is larger than the sum of its proper divisors (2191).

113261 is an equidigital number, since it uses as much as digits as its factorization.

113261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190.

The product of its digits is 36, while the sum is 14.

The square root of 113261 is about 336.5427164566. The cubic root of 113261 is about 48.3830747003.

Adding to 113261 its reverse (162311), we get a palindrome (275572).

The spelling of 113261 in words is "one hundred thirteen thousand, two hundred sixty-one".