113965121 has 4 divisors (see below), whose sum is σ = 114236244. Its totient is φ = 113694000.

The previous prime is 113965087. The next prime is 113965139. The reversal of 113965121 is 121569311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121569311 = 281 ⋅432631.

It can be written as a sum of positive squares in 2 ways, for example, as 44742721 + 69222400 = 6689^2 + 8320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113965121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113965151) 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 3 ways as a sum of consecutive naturals, for example, 134930 + ... + 135771.

It is an arithmetic number, because the mean of its divisors is an integer number (28559061).

Almost surely, 2^113965121 is an apocalyptic number.

It is an amenable number.

113965121 is a deficient number, since it is larger than the sum of its proper divisors (271123).

113965121 is an equidigital number, since it uses as much as digits as its factorization.

113965121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271122.

The product of its digits is 1620, while the sum is 29.

The square root of 113965121 is about 10675.4447682520. Note that the first 3 decimals coincide. The cubic root of 113965121 is about 484.8313027914.

The spelling of 113965121 in words is "one hundred thirteen million, nine hundred sixty-five thousand, one hundred twenty-one".