12641791 has 4 divisors (see below), whose sum is σ = 12719512. Its totient is φ = 12564072.

The previous prime is 12641779. The next prime is 12641801. The reversal of 12641791 is 19714621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19714621 = 3257 ⋅6053.

It is a cyclic number.

It is not a de Polignac number, because 12641791 - 2⁷ = 12641663 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 (12641771) 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, 38616 + ... + 38941.

It is an arithmetic number, because the mean of its divisors is an integer number (3179878).

Almost surely, 2^12641791 is an apocalyptic number.

12641791 is a deficient number, since it is larger than the sum of its proper divisors (77721).

12641791 is an equidigital number, since it uses as much as digits as its factorization.

12641791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77720.

The product of its digits is 3024, while the sum is 31.

The square root of 12641791 is about 3555.5296370583. The cubic root of 12641791 is about 232.9536585003.

The spelling of 12641791 in words is "twelve million, six hundred forty-one thousand, seven hundred ninety-one".