12631585 has 4 divisors (see below), whose sum is σ = 15157908. Its totient is φ = 10105264.

The previous prime is 12631583. The next prime is 12631589. The reversal of 12631585 is 58513621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8567329 + 4064256 = 2927^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631585 - 2¹ = 12631583 is a prime.

It is a super-2 number, since 2×12631585² = 319113879224450, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (12631583) 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, 1263154 + ... + 1263163.

It is an arithmetic number, because the mean of its divisors is an integer number (3789477).

Almost surely, 2^12631585 is an apocalyptic number.

It is an amenable number.

12631585 is a deficient number, since it is larger than the sum of its proper divisors (2526323).

12631585 is an equidigital number, since it uses as much as digits as its factorization.

12631585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526322.

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

The square root of 12631585 is about 3554.0941180560. The cubic root of 12631585 is about 232.8909520601.

The spelling of 12631585 in words is "twelve million, six hundred thirty-one thousand, five hundred eighty-five".