12012656 has 10 divisors (see below), whose sum is σ = 23274552. Its totient is φ = 6006320.

The previous prime is 12012643. The next prime is 12012677. The reversal of 12012656 is 65621021.

12012656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 375380 + ... + 375411.

Almost surely, 2^12012656 is an apocalyptic number.

12012656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12012656 is a deficient number, since it is larger than the sum of its proper divisors (11261896).

12012656 is an equidigital number, since it uses as much as digits as its factorization.

12012656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750799 (or 750793 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12012656 is about 3465.9278699938. The cubic root of 12012656 is about 229.0233063622.

Adding to 12012656 its reverse (65621021), we get a palindrome (77633677).

The spelling of 12012656 in words is "twelve million, twelve thousand, six hundred fifty-six".