12726805 has 32 divisors (see below), whose sum is σ = 19079424. Its totient is φ = 7934976.

The previous prime is 12726803. The next prime is 12726811. The reversal of 12726805 is 50862721.

It is not a de Polignac number, because 12726805 - 2¹ = 12726803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37597 + ... + 37933.

It is an arithmetic number, because the mean of its divisors is an integer number (596232).

Almost surely, 2^12726805 is an apocalyptic number.

It is an amenable number.

12726805 is a deficient number, since it is larger than the sum of its proper divisors (6352619).

12726805 is a wasteful number, since it uses less digits than its factorization.

12726805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 12726805 is about 3567.4647860911. The cubic root of 12726805 is about 233.4746841951.

It can be divided in two parts, 12726 and 805, that added together give a palindrome (13531).

The spelling of 12726805 in words is "twelve million, seven hundred twenty-six thousand, eight hundred five".