12686642 has 16 divisors (see below), whose sum is σ = 20100960. Its totient is φ = 5988672.

The previous prime is 12686629. The next prime is 12686647. The reversal of 12686642 is 24668621.

It is not an unprimeable number, because it can be changed into a prime (12686647) 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, 21098 + ... + 21690.

It is an arithmetic number, because the mean of its divisors is an integer number (1256310).

Almost surely, 2^12686642 is an apocalyptic number.

12686642 is a deficient number, since it is larger than the sum of its proper divisors (7414318).

12686642 is a wasteful number, since it uses less digits than its factorization.

12686642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177.

The product of its digits is 27648, while the sum is 35.

The square root of 12686642 is about 3561.8312705686. The cubic root of 12686642 is about 233.2288271233.

It can be divided in two parts, 126 and 86642, that added together give a palindrome (86768).

The spelling of 12686642 in words is "twelve million, six hundred eighty-six thousand, six hundred forty-two".