12438013 has 12 divisors (see below), whose sum is σ = 14969340. Its totient is φ = 10292352.

The previous prime is 12437969. The next prime is 12438043. The reversal of 12438013 is 31083421.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 3545689 = 2982^2 + 1883^2 .

It is not a de Polignac number, because 12438013 - 2⁹ = 12437501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2956 + ... + 5797.

It is an arithmetic number, because the mean of its divisors is an integer number (1247445).

Almost surely, 2^12438013 is an apocalyptic number.

It is an amenable number.

12438013 is a deficient number, since it is larger than the sum of its proper divisors (2531327).

12438013 is an equidigital number, since it uses as much as digits as its factorization.

12438013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796 (or 8789 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12438013 is about 3526.7567253781. The cubic root of 12438013 is about 231.6951815794.

The spelling of 12438013 in words is "twelve million, four hundred thirty-eight thousand, thirteen".