12512643 has 16 divisors (see below), whose sum is σ = 19600896. Its totient is φ = 6999840.

The previous prime is 12512639. The next prime is 12512651. The reversal of 12512643 is 34621521.

12512643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12512643 - 2² = 12512639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12512653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14155 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (1225056).

Almost surely, 2^12512643 is an apocalyptic number.

12512643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12512643 is a deficient number, since it is larger than the sum of its proper divisors (7088253).

12512643 is a wasteful number, since it uses less digits than its factorization.

12512643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29194.

The product of its digits is 1440, while the sum is 24.

The square root of 12512643 is about 3537.3214442569. The cubic root of 12512643 is about 232.1576601256.

The spelling of 12512643 in words is "twelve million, five hundred twelve thousand, six hundred forty-three".