12815806 has 8 divisors (see below), whose sum is σ = 19670904. Its totient is φ = 6258840.

The previous prime is 12815797. The next prime is 12815813. The reversal of 12815806 is 60851821.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74425 + ... + 74596.

It is an arithmetic number, because the mean of its divisors is an integer number (2458863).

Almost surely, 2^12815806 is an apocalyptic number.

12815806 is a deficient number, since it is larger than the sum of its proper divisors (6855098).

12815806 is a wasteful number, since it uses less digits than its factorization.

12815806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149066.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12815806 is about 3579.9170381449. The cubic root of 12815806 is about 234.0176649191.

The spelling of 12815806 in words is "twelve million, eight hundred fifteen thousand, eight hundred six".