12684634 has 4 divisors (see below), whose sum is σ = 19026954. Its totient is φ = 6342316.

The previous prime is 12684583. The next prime is 12684643. The reversal of 12684634 is 43648621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43648621 = 83 ⋅525887.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 455625 = 3497^2 + 675^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12684634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3171157 + ... + 3171160.

Almost surely, 2^12684634 is an apocalyptic number.

12684634 is a deficient number, since it is larger than the sum of its proper divisors (6342320).

12684634 is an equidigital number, since it uses as much as digits as its factorization.

12684634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342319.

The product of its digits is 27648, while the sum is 34.

The square root of 12684634 is about 3561.5493819404. The cubic root of 12684634 is about 233.2165215766.

The spelling of 12684634 in words is "twelve million, six hundred eighty-four thousand, six hundred thirty-four".