12587618 has 4 divisors (see below), whose sum is σ = 18881430. Its totient is φ = 6293808.

The previous prime is 12587579. The next prime is 12587629. The reversal of 12587618 is 81678521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81678521 = 31 ⋅2634791.

It can be written as a sum of positive squares in only one way, i.e., 10647169 + 1940449 = 3263^2 + 1393^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3146903 + ... + 3146906.

Almost surely, 2^12587618 is an apocalyptic number.

12587618 is a deficient number, since it is larger than the sum of its proper divisors (6293812).

12587618 is an equidigital number, since it uses as much as digits as its factorization.

12587618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293811.

The product of its digits is 26880, while the sum is 38.

The square root of 12587618 is about 3547.9033245003. The cubic root of 12587618 is about 232.6204286114.

The spelling of 12587618 in words is "twelve million, five hundred eighty-seven thousand, six hundred eighteen".