12563439 has 16 divisors (see below), whose sum is σ = 19590912. Its totient is φ = 7011648.

The previous prime is 12563437. The next prime is 12563443. The reversal of 12563439 is 93436521.

It is not a de Polignac number, because 12563439 - 2¹ = 12563437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6054 + ... + 7859.

It is an arithmetic number, because the mean of its divisors is an integer number (1224432).

Almost surely, 2^12563439 is an apocalyptic number.

12563439 is a deficient number, since it is larger than the sum of its proper divisors (7027473).

12563439 is a wasteful number, since it uses less digits than its factorization.

12563439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966.

The product of its digits is 19440, while the sum is 33.

The square root of 12563439 is about 3544.4941811209. The cubic root of 12563439 is about 232.4713897042.

The spelling of 12563439 in words is "twelve million, five hundred sixty-three thousand, four hundred thirty-nine".