13569161 has 4 divisors (see below), whose sum is σ = 13589712. Its totient is φ = 13548612.

The previous prime is 13569151. The next prime is 13569181. The reversal of 13569161 is 16196531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13569161 - 2¹⁸ = 13307017 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 (13569131) 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, 9251 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (3397428).

Almost surely, 2^13569161 is an apocalyptic number.

It is an amenable number.

13569161 is a deficient number, since it is larger than the sum of its proper divisors (20551).

13569161 is an equidigital number, since it uses as much as digits as its factorization.

13569161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20550.

The product of its digits is 4860, while the sum is 32.

The square root of 13569161 is about 3683.6342109390. The cubic root of 13569161 is about 238.5160811147.

It can be divided in two parts, 135 and 69161, that added together give a palindrome (69296).

The spelling of 13569161 in words is "thirteen million, five hundred sixty-nine thousand, one hundred sixty-one".