12767881 has 6 divisors (see below), whose sum is σ = 14852490. Its totient is φ = 10943856.

The previous prime is 12767873. The next prime is 12767893. The reversal of 12767881 is 18876721.

It can be written as a sum of positive squares in only one way, i.e., 8357881 + 4410000 = 2891^2 + 2100^2 .

It is not a de Polignac number, because 12767881 - 2³ = 12767873 is a prime.

It is a super-2 number, since 2×12767881² = 326037570460322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12767281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130236 + ... + 130333.

It is an arithmetic number, because the mean of its divisors is an integer number (2475415).

Almost surely, 2^12767881 is an apocalyptic number.

It is an amenable number.

12767881 is a deficient number, since it is larger than the sum of its proper divisors (2084609).

12767881 is an equidigital number, since it uses as much as digits as its factorization.

12767881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260583 (or 260576 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 12767881 is about 3573.2171778385. The cubic root of 12767881 is about 233.7255957440.

The spelling of 12767881 in words is "twelve million, seven hundred sixty-seven thousand, eight hundred eighty-one".