12272791 has 4 divisors (see below), whose sum is σ = 12280672. Its totient is φ = 12264912.

The previous prime is 12272783. The next prime is 12272801. The reversal of 12272791 is 19727221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19727221 = 29 ⋅680249.

It is a cyclic number.

It is not a de Polignac number, because 12272791 - 2³ = 12272783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12252791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (3070168).

Almost surely, 2^12272791 is an apocalyptic number.

12272791 is a deficient number, since it is larger than the sum of its proper divisors (7881).

12272791 is an equidigital number, since it uses as much as digits as its factorization.

12272791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880.

The product of its digits is 3528, while the sum is 31.

The square root of 12272791 is about 3503.2543441777. The cubic root of 12272791 is about 230.6646871965.

The spelling of 12272791 in words is "twelve million, two hundred seventy-two thousand, seven hundred ninety-one".