12618785 has 4 divisors (see below), whose sum is σ = 15142548. Its totient is φ = 10095024.

The previous prime is 12618779. The next prime is 12618787. The reversal of 12618785 is 58781621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7203856 + 5414929 = 2684^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 12618785 - 2⁴ = 12618769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12618787) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1261874 + ... + 1261883.

It is an arithmetic number, because the mean of its divisors is an integer number (3785637).

Almost surely, 2^12618785 is an apocalyptic number.

It is an amenable number.

12618785 is a deficient number, since it is larger than the sum of its proper divisors (2523763).

12618785 is an equidigital number, since it uses as much as digits as its factorization.

12618785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523762.

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

The square root of 12618785 is about 3552.2929214804. The cubic root of 12618785 is about 232.8122601232.

The spelling of 12618785 in words is "twelve million, six hundred eighteen thousand, seven hundred eighty-five".