13206805 has 32 divisors (see below), whose sum is σ = 17677440. Its totient is φ = 9434880.

The previous prime is 13206793. The next prime is 13206821. The reversal of 13206805 is 50860231.

It is a happy number.

It is not a de Polignac number, because 13206805 - 2¹⁵ = 13174037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13206805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216475 + ... + 216535.

It is an arithmetic number, because the mean of its divisors is an integer number (552420).

Almost surely, 2^13206805 is an apocalyptic number.

It is an amenable number.

13206805 is a deficient number, since it is larger than the sum of its proper divisors (4470635).

13206805 is a wasteful number, since it uses less digits than its factorization.

13206805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13206805 is about 3634.1168115513. The cubic root of 13206805 is about 236.3737554167.

The spelling of 13206805 in words is "thirteen million, two hundred six thousand, eight hundred five".