12986618 has 4 divisors (see below), whose sum is σ = 19479930. Its totient is φ = 6493308.

The previous prime is 12986609. The next prime is 12986647. The reversal of 12986618 is 81668921.

12986618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81668921 = 59 ⋅1384219.

It can be written as a sum of positive squares in only one way, i.e., 9878449 + 3108169 = 3143^2 + 1763^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3246653 + ... + 3246656.

Almost surely, 2^12986618 is an apocalyptic number.

12986618 is a deficient number, since it is larger than the sum of its proper divisors (6493312).

12986618 is an equidigital number, since it uses as much as digits as its factorization.

12986618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6493311.

The product of its digits is 41472, while the sum is 41.

The square root of 12986618 is about 3603.6950481416. The cubic root of 12986618 is about 235.0527601472.

The spelling of 12986618 in words is "twelve million, nine hundred eighty-six thousand, six hundred eighteen".