12684544 has 18 divisors (see below), whose sum is σ = 25320050. Its totient is φ = 6342144.

The previous prime is 12684541. The next prime is 12684557. The reversal of 12684544 is 44548621.

It can be written as a sum of positive squares in only one way, i.e., 12166144 + 518400 = 3488^2 + 720^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684541) 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 as a sum of consecutive naturals, namely, 24519 + ... + 25030.

Almost surely, 2^12684544 is an apocalyptic number.

It is an amenable number.

12684544 is a deficient number, since it is larger than the sum of its proper divisors (12635506).

12684544 is an frugal number, since it uses more digits than its factorization.

12684544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49565 (or 49551 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 12684544 is about 3561.5367469675. The cubic root of 12684544 is about 233.2159700028.

It can be divided in two parts, 12684 and 544, that multiplied together give a palindrome (6900096).

The spelling of 12684544 in words is "twelve million, six hundred eighty-four thousand, five hundred forty-four".