12499638 has 16 divisors (see below), whose sum is σ = 25861680. Its totient is φ = 4022816.

The previous prime is 12499631. The next prime is 12499639. The reversal of 12499638 is 83699421.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 12499638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35745 + ... + 36092.

It is an arithmetic number, because the mean of its divisors is an integer number (1616355).

Almost surely, 2^12499638 is an apocalyptic number.

12499638 is an abundant number, since it is smaller than the sum of its proper divisors (13362042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12499638 is a wasteful number, since it uses less digits than its factorization.

12499638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71871.

The product of its digits is 93312, while the sum is 42.

The square root of 12499638 is about 3535.4827110311. The cubic root of 12499638 is about 232.0772013188.

The spelling of 12499638 in words is "twelve million, four hundred ninety-nine thousand, six hundred thirty-eight".