13565091 has 8 divisors (see below), whose sum is σ = 18104320. Its totient is φ = 9034632.

The previous prime is 13565089. The next prime is 13565129. The reversal of 13565091 is 19056531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13565091 - 2¹ = 13565089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13565491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3630 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (2263040).

Almost surely, 2^13565091 is an apocalyptic number.

13565091 is a deficient number, since it is larger than the sum of its proper divisors (4539229).

13565091 is a wasteful number, since it uses less digits than its factorization.

13565091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 13565091 is about 3683.0817259464. The cubic root of 13565091 is about 238.4922315064.

The spelling of 13565091 in words is "thirteen million, five hundred sixty-five thousand, ninety-one".