12631855 has 4 divisors (see below), whose sum is σ = 15158232. Its totient is φ = 10105480.

The previous prime is 12631831. The next prime is 12631873. The reversal of 12631855 is 55813621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55813621 = 19 ⋅2937559.

It is not a de Polignac number, because 12631855 - 2¹¹ = 12629807 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263181 + ... + 1263190.

It is an arithmetic number, because the mean of its divisors is an integer number (3789558).

Almost surely, 2^12631855 is an apocalyptic number.

12631855 is a deficient number, since it is larger than the sum of its proper divisors (2526377).

12631855 is an equidigital number, since it uses as much as digits as its factorization.

12631855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526376.

The product of its digits is 7200, while the sum is 31.

The square root of 12631855 is about 3554.1321022157. The cubic root of 12631855 is about 232.8926113955.

The spelling of 12631855 in words is "twelve million, six hundred thirty-one thousand, eight hundred fifty-five".