12931424 has 48 divisors (see below), whose sum is σ = 29420496. Its totient is φ = 5529600.

The previous prime is 12931423. The next prime is 12931427. The reversal of 12931424 is 42413921.

It is a junction number, because it is equal to n+sod(n) for n = 12931393 and 12931402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4904 + ... + 7064.

It is an arithmetic number, because the mean of its divisors is an integer number (612927).

Almost surely, 2^12931424 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 12931424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14710248).

12931424 is an abundant number, since it is smaller than the sum of its proper divisors (16489072).

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

12931424 is a wasteful number, since it uses less digits than its factorization.

12931424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2191 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 12931424 is about 3596.0289209071. The cubic root of 12931424 is about 234.7192905972.

The spelling of 12931424 in words is "twelve million, nine hundred thirty-one thousand, four hundred twenty-four".