13606405 has 8 divisors (see below), whose sum is σ = 16432632. Its totient is φ = 10815168.

The previous prime is 13606393. The next prime is 13606421. The reversal of 13606405 is 50460631.

It can be written as a sum of positive squares in 4 ways, for example, as 56644 + 13549761 = 238^2 + 3681^2 .

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 13606405 - 2¹³ = 13598213 is a prime.

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 13606405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7882 + ... + 9451.

It is an arithmetic number, because the mean of its divisors is an integer number (2054079).

Almost surely, 2^13606405 is an apocalyptic number.

It is an amenable number.

13606405 is a deficient number, since it is larger than the sum of its proper divisors (2826227).

13606405 is a wasteful number, since it uses less digits than its factorization.

13606405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17495.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 13606405 is about 3688.6860804357. The cubic root of 13606405 is about 238.7341043665.

The spelling of 13606405 in words is "thirteen million, six hundred six thousand, four hundred five".