12447013 has 4 divisors (see below), whose sum is σ = 12530700. Its totient is φ = 12363328.

The previous prime is 12447007. The next prime is 12447023. The reversal of 12447013 is 31074421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8191044 + 4255969 = 2862^2 + 2063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12447013 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 (12447023) 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, 41620 + ... + 41917.

It is an arithmetic number, because the mean of its divisors is an integer number (3132675).

Almost surely, 2^12447013 is an apocalyptic number.

It is an amenable number.

12447013 is a deficient number, since it is larger than the sum of its proper divisors (83687).

12447013 is an equidigital number, since it uses as much as digits as its factorization.

12447013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83686.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12447013 is about 3528.0324544992. The cubic root of 12447013 is about 231.7510520758.

The spelling of 12447013 in words is "twelve million, four hundred forty-seven thousand, thirteen".