12516636 has 24 divisors (see below), whose sum is σ = 31860864. Its totient is φ = 3792880.

The previous prime is 12516631. The next prime is 12516643. The reversal of 12516636 is 63661521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516631) 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, 47280 + ... + 47543.

It is an arithmetic number, because the mean of its divisors is an integer number (1327536).

Almost surely, 2^12516636 is an apocalyptic number.

It is an amenable number.

12516636 is an abundant number, since it is smaller than the sum of its proper divisors (19344228).

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

12516636 is a wasteful number, since it uses less digits than its factorization.

12516636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94841 (or 94839 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 12516636 is about 3537.8858093500. The cubic root of 12516636 is about 232.1823526692.

It can be divided in two parts, 1251 and 6636, that added together give a palindrome (7887).

The spelling of 12516636 in words is "twelve million, five hundred sixteen thousand, six hundred thirty-six".