12649 has 8 divisors (see below), whose sum is σ = 15680. Its totient is φ = 9936.

The previous prime is 12647. The next prime is 12653. The reversal of 12649 is 94621.

12649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12649 - 2¹ = 12647 is a prime.

12649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (12641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 160.

It is an arithmetic number, because the mean of its divisors is an integer number (1960).

2¹²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

12649 is a deficient number, since it is larger than the sum of its proper divisors (3031).

12649 is a wasteful number, since it uses less digits than its factorization.

12649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its digits is 432, while the sum is 22.

The square root of 12649 is about 112.4677731619. The cubic root of 12649 is about 23.2997930809.

The spelling of 12649 in words is "twelve thousand, six hundred forty-nine".