12805631 has 4 divisors (see below), whose sum is σ = 12986064. Its totient is φ = 12625200.

The previous prime is 12805627. The next prime is 12805673. The reversal of 12805631 is 13650821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13650821 = 47 ⋅290443.

It is a cyclic number.

It is not a de Polignac number, because 12805631 - 2² = 12805627 is a prime.

It is a super-2 number, since 2×12805631² = 327968370616322, which contains 22 as substring.

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 12805631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805621) 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, 90110 + ... + 90251.

It is an arithmetic number, because the mean of its divisors is an integer number (3246516).

Almost surely, 2^12805631 is an apocalyptic number.

12805631 is a deficient number, since it is larger than the sum of its proper divisors (180433).

12805631 is an equidigital number, since it uses as much as digits as its factorization.

12805631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180432.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12805631 is about 3578.4956336427. The cubic root of 12805631 is about 233.9557164112.

The spelling of 12805631 in words is "twelve million, eight hundred five thousand, six hundred thirty-one".