12618517 has 4 divisors (see below), whose sum is σ = 12959596. Its totient is φ = 12277440.

The previous prime is 12618511. The next prime is 12618547. The reversal of 12618517 is 71581621.

12618517 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 5171076 = 2729^2 + 2274^2 .

It is a cyclic number.

It is not a de Polignac number, because 12618517 - 2¹¹ = 12616469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12618511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170484 + ... + 170557.

It is an arithmetic number, because the mean of its divisors is an integer number (3239899).

Almost surely, 2^12618517 is an apocalyptic number.

It is an amenable number.

12618517 is a deficient number, since it is larger than the sum of its proper divisors (341079).

12618517 is an equidigital number, since it uses as much as digits as its factorization.

12618517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341078.

The product of its digits is 3360, while the sum is 31.

The square root of 12618517 is about 3552.2551991657. The cubic root of 12618517 is about 232.8106119421.

The spelling of 12618517 in words is "twelve million, six hundred eighteen thousand, five hundred seventeen".