12771867 has 4 divisors (see below), whose sum is σ = 17029160. Its totient is φ = 8514576.

The previous prime is 12771853. The next prime is 12771883. The reversal of 12771867 is 76817721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12771867 - 2¹⁰ = 12770843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12773867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128642 + ... + 2128647.

It is an arithmetic number, because the mean of its divisors is an integer number (4257290).

Almost surely, 2^12771867 is an apocalyptic number.

12771867 is a deficient number, since it is larger than the sum of its proper divisors (4257293).

12771867 is an equidigital number, since it uses as much as digits as its factorization.

12771867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257292.

The product of its digits is 32928, while the sum is 39.

The square root of 12771867 is about 3573.7748949815. The cubic root of 12771867 is about 233.7499154489.

The spelling of 12771867 in words is "twelve million, seven hundred seventy-one thousand, eight hundred sixty-seven".