13112305 has 4 divisors (see below), whose sum is σ = 15734772. Its totient is φ = 10489840.

The previous prime is 13112273. The next prime is 13112329. The reversal of 13112305 is 50321131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50321131 = 7 ⋅7188733.

It can be written as a sum of positive squares in 2 ways, for example, as 6922161 + 6190144 = 2631^2 + 2488^2 .

It is not a de Polignac number, because 13112305 - 2⁵ = 13112273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1311226 + ... + 1311235.

It is an arithmetic number, because the mean of its divisors is an integer number (3933693).

Almost surely, 2^13112305 is an apocalyptic number.

It is an amenable number.

13112305 is a deficient number, since it is larger than the sum of its proper divisors (2622467).

13112305 is an equidigital number, since it uses as much as digits as its factorization.

13112305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622466.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13112305 is about 3621.0916862184. The cubic root of 13112305 is about 235.8086222601.

Adding to 13112305 its reverse (50321131), we get a palindrome (63433436).

The spelling of 13112305 in words is "thirteen million, one hundred twelve thousand, three hundred five".