12790649 has 4 divisors (see below), whose sum is σ = 13032036. Its totient is φ = 12549264.

The previous prime is 12790639. The next prime is 12790699. The reversal of 12790649 is 94609721.

12790649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8410000 + 4380649 = 2900^2 + 2093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12790649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12790639) 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, 120614 + ... + 120719.

It is an arithmetic number, because the mean of its divisors is an integer number (3258009).

Almost surely, 2^12790649 is an apocalyptic number.

It is an amenable number.

12790649 is a deficient number, since it is larger than the sum of its proper divisors (241387).

12790649 is an equidigital number, since it uses as much as digits as its factorization.

12790649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241386.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12790649 is about 3576.4016832565. The cubic root of 12790649 is about 233.8644416593.

The spelling of 12790649 in words is "twelve million, seven hundred ninety thousand, six hundred forty-nine".