12775681 has 8 divisors (see below), whose sum is σ = 13115520. Its totient is φ = 12438768.

The previous prime is 12775663. The next prime is 12775691. The reversal of 12775681 is 18657721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12775681 - 2¹⁵ = 12742913 is a prime.

It is a super-2 number, since 2×12775681² = 326436050027522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12775681.

It is not an unprimeable number, because it can be changed into a prime (12775621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10170 + ... + 11356.

It is an arithmetic number, because the mean of its divisors is an integer number (1639440).

Almost surely, 2^12775681 is an apocalyptic number.

It is an amenable number.

12775681 is a deficient number, since it is larger than the sum of its proper divisors (339839).

12775681 is a wasteful number, since it uses less digits than its factorization.

12775681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its digits is 23520, while the sum is 37.

The square root of 12775681 is about 3574.3084645844. The cubic root of 12775681 is about 233.7731809967.

It can be divided in two parts, 12775 and 681, that added together give a square (13456 = 116²).

The spelling of 12775681 in words is "twelve million, seven hundred seventy-five thousand, six hundred eighty-one".