12886645 has 4 divisors (see below), whose sum is σ = 15463980. Its totient is φ = 10309312.

The previous prime is 12886589. The next prime is 12886649. The reversal of 12886645 is 54668821.

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 1976836 + 10909809 = 1406^2 + 3303^2 .

It is a cyclic number.

It is not a de Polignac number, because 12886645 - 2¹⁵ = 12853877 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12886598 and 12886607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12886649) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1288660 + ... + 1288669.

It is an arithmetic number, because the mean of its divisors is an integer number (3865995).

Almost surely, 2^12886645 is an apocalyptic number.

It is an amenable number.

12886645 is a deficient number, since it is larger than the sum of its proper divisors (2577335).

12886645 is an equidigital number, since it uses as much as digits as its factorization.

12886645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577334.

The product of its digits is 92160, while the sum is 40.

The square root of 12886645 is about 3589.7973480407. The cubic root of 12886645 is about 234.4480482231.

It can be divided in two parts, 12886 and 645, that added together give a palindrome (13531).

The spelling of 12886645 in words is "twelve million, eight hundred eighty-six thousand, six hundred forty-five".