12563438 has 32 divisors (see below), whose sum is σ = 20489760. Its totient is φ = 5765760.

The previous prime is 12563437. The next prime is 12563443. The reversal of 12563438 is 83436521.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187481 + ... + 187547.

It is an arithmetic number, because the mean of its divisors is an integer number (640305).

Almost surely, 2^12563438 is an apocalyptic number.

12563438 is a deficient number, since it is larger than the sum of its proper divisors (7926322).

12563438 is a wasteful number, since it uses less digits than its factorization.

12563438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its digits is 17280, while the sum is 32.

The square root of 12563438 is about 3544.4940400571. The cubic root of 12563438 is about 232.4713835362.

Adding to 12563438 its reverse (83436521), we get a palindrome (95999959).

The spelling of 12563438 in words is "twelve million, five hundred sixty-three thousand, four hundred thirty-eight".