12628631 has 4 divisors (see below), whose sum is σ = 12744600. Its totient is φ = 12512664.

The previous prime is 12628613. The next prime is 12628657. The reversal of 12628631 is 13682621.

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

It is a cyclic number.

It is not a de Polignac number, because 12628631 - 2¹⁰ = 12627607 is a prime.

It is a super-2 number, since 2×12628631² = 318964641868322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12628594 and 12628603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12625631) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 57821 + ... + 58038.

It is an arithmetic number, because the mean of its divisors is an integer number (3186150).

Almost surely, 2^12628631 is an apocalyptic number.

12628631 is a deficient number, since it is larger than the sum of its proper divisors (115969).

12628631 is a wasteful number, since it uses less digits than its factorization.

12628631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115968.

The product of its digits is 3456, while the sum is 29.

The square root of 12628631 is about 3553.6785166922. The cubic root of 12628631 is about 232.8727961568.

The spelling of 12628631 in words is "twelve million, six hundred twenty-eight thousand, six hundred thirty-one".