12636506 has 4 divisors (see below), whose sum is σ = 18954762. Its totient is φ = 6318252.

The previous prime is 12636497. The next prime is 12636517. The reversal of 12636506 is 60563621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 1713481 = 3305^2 + 1309^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159125 + ... + 3159128.

Almost surely, 2^12636506 is an apocalyptic number.

12636506 is a deficient number, since it is larger than the sum of its proper divisors (6318256).

12636506 is an equidigital number, since it uses as much as digits as its factorization.

12636506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318255.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 12636506 is about 3554.7863508234. The cubic root of 12636506 is about 232.9211912734.

The spelling of 12636506 in words is "twelve million, six hundred thirty-six thousand, five hundred six".