12270805 has 4 divisors (see below), whose sum is σ = 14724972. Its totient is φ = 9816640.

The previous prime is 12270763. The next prime is 12270871. The reversal of 12270805 is 50807221.

12270805 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7969329 + 4301476 = 2823^2 + 2074^2 .

It is not a de Polignac number, because 12270805 - 2⁷ = 12270677 is a prime.

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 12270805.

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, 1227076 + ... + 1227085.

It is an arithmetic number, because the mean of its divisors is an integer number (3681243).

Almost surely, 2^12270805 is an apocalyptic number.

It is an amenable number.

12270805 is a deficient number, since it is larger than the sum of its proper divisors (2454167).

12270805 is an equidigital number, since it uses as much as digits as its factorization.

12270805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454166.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 12270805 is about 3502.9708819800. The cubic root of 12270805 is about 230.6522443658.

The spelling of 12270805 in words is "twelve million, two hundred seventy thousand, eight hundred five".