12784649 has 4 divisors (see below), whose sum is σ = 12946560. Its totient is φ = 12622740.

The previous prime is 12784643. The next prime is 12784687. The reversal of 12784649 is 94648721.

12784649 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12784649 - 2⁴ = 12784633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12784643) 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, 80837 + ... + 80994.

It is an arithmetic number, because the mean of its divisors is an integer number (3236640).

Almost surely, 2^12784649 is an apocalyptic number.

It is an amenable number.

12784649 is a deficient number, since it is larger than the sum of its proper divisors (161911).

12784649 is an equidigital number, since it uses as much as digits as its factorization.

12784649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161910.

The product of its digits is 96768, while the sum is 41.

The square root of 12784649 is about 3575.5627529104. The cubic root of 12784649 is about 233.8278679062.

The spelling of 12784649 in words is "twelve million, seven hundred eighty-four thousand, six hundred forty-nine".