12656424 has 64 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 3800000.

The previous prime is 12656419. The next prime is 12656431. The reversal of 12656424 is 42465621.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 12656391 and 12656400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50299 + ... + 50549.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^12656424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12656424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17418240).

12656424 is an abundant number, since it is smaller than the sum of its proper divisors (22180056).

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

12656424 is a wasteful number, since it uses less digits than its factorization.

12656424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 458 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 12656424 is about 3557.5868225526. The cubic root of 12656424 is about 233.0435059090.

The spelling of 12656424 in words is "twelve million, six hundred fifty-six thousand, four hundred twenty-four".