12720886 has 16 divisors (see below), whose sum is σ = 20072448. Its totient is φ = 6034600.

The previous prime is 12720847. The next prime is 12720887. The reversal of 12720886 is 68802721.

12720886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4971 + ... + 7081.

It is an arithmetic number, because the mean of its divisors is an integer number (1254528).

Almost surely, 2^12720886 is an apocalyptic number.

12720886 is a deficient number, since it is larger than the sum of its proper divisors (7351562).

12720886 is a wasteful number, since it uses less digits than its factorization.

12720886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 12720886 is about 3566.6351088947. The cubic root of 12720886 is about 233.4384836732.

The spelling of 12720886 in words is "twelve million, seven hundred twenty thousand, eight hundred eighty-six".