12718718 has 4 divisors (see below), whose sum is σ = 19078080. Its totient is φ = 6359358.

The previous prime is 12718709. The next prime is 12718721. The reversal of 12718718 is 81781721.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3179678 + ... + 3179681.

It is an arithmetic number, because the mean of its divisors is an integer number (4769520).

Almost surely, 2^12718718 is an apocalyptic number.

12718718 is a deficient number, since it is larger than the sum of its proper divisors (6359362).

12718718 is an equidigital number, since it uses as much as digits as its factorization.

12718718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6359361.

The product of its digits is 6272, while the sum is 35.

The square root of 12718718 is about 3566.3311680213. The cubic root of 12718718 is about 233.4252214055.

The spelling of 12718718 in words is "twelve million, seven hundred eighteen thousand, seven hundred eighteen".