12958656 has 28 divisors (see below), whose sum is σ = 34286952. Its totient is φ = 4319488.

The previous prime is 12958633. The next prime is 12958691. The reversal of 12958656 is 65685921.

12958656 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 in 3 ways as a sum of consecutive naturals, for example, 33555 + ... + 33938.

It is an arithmetic number, because the mean of its divisors is an integer number (1224534).

Almost surely, 2^12958656 is an apocalyptic number.

12958656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12958656 is an abundant number, since it is smaller than the sum of its proper divisors (21328296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12958656 is an equidigital number, since it uses as much as digits as its factorization.

12958656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67508 (or 67498 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 12958656 is about 3599.8133284936. The cubic root of 12958656 is about 234.8839384640.

It can be divided in two parts, 129 and 58656, that added together give a palindrome (58785).

The spelling of 12958656 in words is "twelve million, nine hundred fifty-eight thousand, six hundred fifty-six".