12897618 has 32 divisors (see below), whose sum is σ = 28339200. Its totient is φ = 3895056.

The previous prime is 12897593. The next prime is 12897623. The reversal of 12897618 is 81679821.

It is a self number, because there is not a number n which added to its sum of digits gives 12897618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163 + ... + 5081.

It is an arithmetic number, because the mean of its divisors is an integer number (885600).

Almost surely, 2^12897618 is an apocalyptic number.

12897618 is an abundant number, since it is smaller than the sum of its proper divisors (15441582).

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

12897618 is a wasteful number, since it uses less digits than its factorization.

12897618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966.

The product of its digits is 48384, while the sum is 42.

The square root of 12897618 is about 3591.3253820839. The cubic root of 12897618 is about 234.5145736476.

The spelling of 12897618 in words is "twelve million, eight hundred ninety-seven thousand, six hundred eighteen".