12856424 has 24 divisors (see below), whose sum is σ = 28042290. Its totient is φ = 5509728.

The previous prime is 12856423. The next prime is 12856447. The reversal of 12856424 is 42465821.

It can be written as a sum of positive squares in only one way, i.e., 6853924 + 6002500 = 2618^2 + 2450^2 .

It is not an unprimeable number, because it can be changed into a prime (12856423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16007 + ... + 16790.

Almost surely, 2^12856424 is an apocalyptic number.

12856424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12856424 is an abundant number, since it is smaller than the sum of its proper divisors (15185866).

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

12856424 is a wasteful number, since it uses less digits than its factorization.

12856424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32817 (or 32806 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 12856424 is about 3585.5855867626. The cubic root of 12856424 is about 234.2646335243.

The spelling of 12856424 in words is "twelve million, eight hundred fifty-six thousand, four hundred twenty-four".