12659631 has 8 divisors (see below), whose sum is σ = 17461680. Its totient is φ = 8148672.

The previous prime is 12659629. The next prime is 12659657. The reversal of 12659631 is 13695621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12659631 - 2¹ = 12659629 is a prime.

It is a super-2 number, since 2×12659631² = 320532514112322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12659592 and 12659601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12659531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72670 + ... + 72843.

It is an arithmetic number, because the mean of its divisors is an integer number (2182710).

Almost surely, 2^12659631 is an apocalyptic number.

12659631 is a deficient number, since it is larger than the sum of its proper divisors (4802049).

12659631 is a wasteful number, since it uses less digits than its factorization.

12659631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145545.

The product of its digits is 9720, while the sum is 33.

The square root of 12659631 is about 3558.0375208814. The cubic root of 12659631 is about 233.0631878088.

The spelling of 12659631 in words is "twelve million, six hundred fifty-nine thousand, six hundred thirty-one".