12431396 has 18 divisors (see below), whose sum is σ = 22962870. Its totient is φ = 5887872.

The previous prime is 12431387. The next prime is 12431399. The reversal of 12431396 is 69313421.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 3189796 = 3040^2 + 1786^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2861 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (1275715).

Almost surely, 2^12431396 is an apocalyptic number.

It is an amenable number.

12431396 is a deficient number, since it is larger than the sum of its proper divisors (10531474).

12431396 is a wasteful number, since it uses less digits than its factorization.

12431396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651 (or 8630 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 12431396 is about 3525.8184865361. The cubic root of 12431396 is about 231.6540871546.

The spelling of 12431396 in words is "twelve million, four hundred thirty-one thousand, three hundred ninety-six".