13564671 has 4 divisors (see below), whose sum is σ = 18086232. Its totient is φ = 9043112.

The previous prime is 13564669. The next prime is 13564679. The reversal of 13564671 is 17646531.

13564671 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 13564671 - 2¹ = 13564669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13564679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260776 + ... + 2260781.

It is an arithmetic number, because the mean of its divisors is an integer number (4521558).

Almost surely, 2^13564671 is an apocalyptic number.

13564671 is a deficient number, since it is larger than the sum of its proper divisors (4521561).

13564671 is an equidigital number, since it uses as much as digits as its factorization.

13564671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521560.

The product of its digits is 15120, while the sum is 33.

The square root of 13564671 is about 3683.0247080355. The cubic root of 13564671 is about 238.4897700960.

The spelling of 13564671 in words is "thirteen million, five hundred sixty-four thousand, six hundred seventy-one".