12877681 has 4 divisors (see below), whose sum is σ = 12894832. Its totient is φ = 12860532.

The previous prime is 12877661. The next prime is 12877703. The reversal of 12877681 is 18677821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12877681 - 2¹⁵ = 12844913 is a prime.

It is a super-2 number, since 2×12877681² = 331669335875522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12877661) 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, 7395 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (3223708).

Almost surely, 2^12877681 is an apocalyptic number.

It is an amenable number.

12877681 is a deficient number, since it is larger than the sum of its proper divisors (17151).

12877681 is an equidigital number, since it uses as much as digits as its factorization.

12877681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17150.

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

The square root of 12877681 is about 3588.5485923978. The cubic root of 12877681 is about 234.3936746246.

The spelling of 12877681 in words is "twelve million, eight hundred seventy-seven thousand, six hundred eighty-one".