12681618 has 8 divisors (see below), whose sum is σ = 25363248. Its totient is φ = 4227204.

The previous prime is 12681601. The next prime is 12681619. The reversal of 12681618 is 81618621.

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

12681618 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12681619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056796 + ... + 1056807.

It is an arithmetic number, because the mean of its divisors is an integer number (3170406).

Almost surely, 2^12681618 is an apocalyptic number.

12681618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12681618 is a wasteful number, since it uses less digits than its factorization.

12681618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113608.

The product of its digits is 4608, while the sum is 33.

The square root of 12681618 is about 3561.1259455403. The cubic root of 12681618 is about 233.1980363032.

The spelling of 12681618 in words is "twelve million, six hundred eighty-one thousand, six hundred eighteen".