13601569 has 4 divisors (see below), whose sum is σ = 13736340. Its totient is φ = 13466800.

The previous prime is 13601563. The next prime is 13601593. The reversal of 13601569 is 96510631.

13601569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13046544 + 555025 = 3612^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 13601569 - 2³ = 13601561 is a prime.

It is a super-2 number, since 2×13601569² = 370005358523522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13601569.

It is not an unprimeable number, because it can be changed into a prime (13601561) 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, 67234 + ... + 67435.

It is an arithmetic number, because the mean of its divisors is an integer number (3434085).

Almost surely, 2^13601569 is an apocalyptic number.

It is an amenable number.

13601569 is a deficient number, since it is larger than the sum of its proper divisors (134771).

13601569 is a wasteful number, since it uses less digits than its factorization.

13601569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134770.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13601569 is about 3688.0305042122. The cubic root of 13601569 is about 238.7058173223.

The spelling of 13601569 in words is "thirteen million, six hundred one thousand, five hundred sixty-nine".