12712618 has 4 divisors (see below), whose sum is σ = 19068930. Its totient is φ = 6356308.

The previous prime is 12712603. The next prime is 12712619. The reversal of 12712618 is 81621721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11336689 + 1375929 = 3367^2 + 1173^2 .

It is a super-2 number, since 2×12712618² = 323221312827848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12712619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3178153 + ... + 3178156.

Almost surely, 2^12712618 is an apocalyptic number.

12712618 is a deficient number, since it is larger than the sum of its proper divisors (6356312).

12712618 is an equidigital number, since it uses as much as digits as its factorization.

12712618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356311.

The product of its digits is 1344, while the sum is 28.

The square root of 12712618 is about 3565.4758448207. The cubic root of 12712618 is about 233.3878978968.

The spelling of 12712618 in words is "twelve million, seven hundred twelve thousand, six hundred eighteen".