12440013 has 4 divisors (see below), whose sum is σ = 16586688. Its totient is φ = 8293340.

The previous prime is 12440009. The next prime is 12440017. The reversal of 12440013 is 31004421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12440009) and next prime (12440017).

It is a cyclic number.

It is not a de Polignac number, because 12440013 - 2² = 12440009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12439974 and 12440001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2073333 + ... + 2073338.

It is an arithmetic number, because the mean of its divisors is an integer number (4146672).

Almost surely, 2^12440013 is an apocalyptic number.

It is an amenable number.

12440013 is a deficient number, since it is larger than the sum of its proper divisors (4146675).

12440013 is an equidigital number, since it uses as much as digits as its factorization.

12440013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146674.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12440013 is about 3527.0402606151. The cubic root of 12440013 is about 231.7075995738.

Adding to 12440013 its reverse (31004421), we get a palindrome (43444434).

The spelling of 12440013 in words is "twelve million, four hundred forty thousand, thirteen".