12685637 has 4 divisors (see below), whose sum is σ = 12838560. Its totient is φ = 12532716.

The previous prime is 12685633. The next prime is 12685639. The reversal of 12685637 is 73658621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73658621 = 1657 ⋅44453.

It is a cyclic number.

It is not a de Polignac number, because 12685637 - 2² = 12685633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12685637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76337 + ... + 76502.

It is an arithmetic number, because the mean of its divisors is an integer number (3209640).

Almost surely, 2^12685637 is an apocalyptic number.

It is an amenable number.

12685637 is a deficient number, since it is larger than the sum of its proper divisors (152923).

12685637 is an equidigital number, since it uses as much as digits as its factorization.

12685637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152922.

The product of its digits is 60480, while the sum is 38.

The square root of 12685637 is about 3561.6901886604. The cubic root of 12685637 is about 233.2226683840. Note that the first 3 decimals are identical.

The spelling of 12685637 in words is "twelve million, six hundred eighty-five thousand, six hundred thirty-seven".