12791771 has 4 divisors (see below), whose sum is σ = 12801000. Its totient is φ = 12782544.

The previous prime is 12791687. The next prime is 12791773. The reversal of 12791771 is 17719721.

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: 17719721 = 3697 ⋅4793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12791771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12791773) 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, 2066 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (3200250).

Almost surely, 2^12791771 is an apocalyptic number.

12791771 is a deficient number, since it is larger than the sum of its proper divisors (9229).

12791771 is an equidigital number, since it uses as much as digits as its factorization.

12791771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228.

The product of its digits is 6174, while the sum is 35.

The square root of 12791771 is about 3576.5585413914. The cubic root of 12791771 is about 233.8712796817.

The spelling of 12791771 in words is "twelve million, seven hundred ninety-one thousand, seven hundred seventy-one".