13564405 has 8 divisors (see below), whose sum is σ = 16298712. Its totient is φ = 10837248.

The previous prime is 13564361. The next prime is 13564409. The reversal of 13564405 is 50446531.

It can be written as a sum of positive squares in 4 ways, for example, as 1495729 + 12068676 = 1223^2 + 3474^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13564405 - 2¹⁷ = 13433333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13564409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4249 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (2037339).

Almost surely, 2^13564405 is an apocalyptic number.

It is an amenable number.

13564405 is a deficient number, since it is larger than the sum of its proper divisors (2734307).

13564405 is a wasteful number, since it uses less digits than its factorization.

13564405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 13564405 is about 3682.9885962354. The cubic root of 13564405 is about 238.4882111764.

The spelling of 13564405 in words is "thirteen million, five hundred sixty-four thousand, four hundred five".