113521261 has 16 divisors (see below), whose sum is σ = 137299968. Its totient is φ = 91753200.

The previous prime is 113521259. The next prime is 113521267. The reversal of 113521261 is 162125311.

It is a happy number.

It is not a de Polignac number, because 113521261 - 2¹ = 113521259 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 (113521267) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6466 + ... + 16396.

It is an arithmetic number, because the mean of its divisors is an integer number (8581248).

Almost surely, 2^113521261 is an apocalyptic number.

It is an amenable number.

113521261 is a deficient number, since it is larger than the sum of its proper divisors (23778707).

113521261 is an equidigital number, since it uses as much as digits as its factorization.

113521261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10032.

The product of its digits is 360, while the sum is 22.

The square root of 113521261 is about 10654.6356577783. The cubic root of 113521261 is about 484.2010596595.

Adding to 113521261 its reverse (162125311), we get a palindrome (275646572).

The spelling of 113521261 in words is "one hundred thirteen million, five hundred twenty-one thousand, two hundred sixty-one".