12544013 has 4 divisors (see below), whose sum is σ = 12551100. Its totient is φ = 12536928.

The previous prime is 12544001. The next prime is 12544019. The reversal of 12544013 is 31044521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 174724 + 12369289 = 418^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544013 - 2⁴ = 12543997 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 (12544019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (3137775).

Almost surely, 2^12544013 is an apocalyptic number.

It is an amenable number.

12544013 is a deficient number, since it is larger than the sum of its proper divisors (7087).

12544013 is an equidigital number, since it uses as much as digits as its factorization.

12544013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7086.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12544013 is about 3541.7528146385. The cubic root of 12544013 is about 232.3515096085.

Adding to 12544013 its reverse (31044521), we get a palindrome (43588534).

The spelling of 12544013 in words is "twelve million, five hundred forty-four thousand, thirteen".