13561169 has 4 divisors (see below), whose sum is σ = 13695540. Its totient is φ = 13426800.

The previous prime is 13561157. The next prime is 13561199. The reversal of 13561169 is 96116531.

It is a happy number.

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 12816400 + 744769 = 3580^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 13561169 - 2⁴ = 13561153 is a prime.

It is a super-2 number, since 2×13561169² = 367810609293122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13561139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67034 + ... + 67235.

It is an arithmetic number, because the mean of its divisors is an integer number (3423885).

Almost surely, 2^13561169 is an apocalyptic number.

It is an amenable number.

13561169 is a deficient number, since it is larger than the sum of its proper divisors (134371).

13561169 is a wasteful number, since it uses less digits than its factorization.

13561169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134370.

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

The square root of 13561169 is about 3682.5492528953. The cubic root of 13561169 is about 238.4692446428.

The spelling of 13561169 in words is "thirteen million, five hundred sixty-one thousand, one hundred sixty-nine".