13811065 has 4 divisors (see below), whose sum is σ = 16573284. Its totient is φ = 11048848.

The previous prime is 13811053. The next prime is 13811087. The reversal of 13811065 is 56011831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9162729 + 4648336 = 3027^2 + 2156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13811065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381102 + ... + 1381111.

It is an arithmetic number, because the mean of its divisors is an integer number (4143321).

Almost surely, 2^13811065 is an apocalyptic number.

It is an amenable number.

13811065 is a deficient number, since it is larger than the sum of its proper divisors (2762219).

13811065 is an equidigital number, since it uses as much as digits as its factorization.

13811065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762218.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 13811065 is about 3716.3241247232. The cubic root of 13811065 is about 239.9251213166.

Adding to 13811065 its reverse (56011831), we get a palindrome (69822896).

The spelling of 13811065 in words is "thirteen million, eight hundred eleven thousand, sixty-five".