12827681 has 4 divisors (see below), whose sum is σ = 12834864. Its totient is φ = 12820500.

The previous prime is 12827669. The next prime is 12827693. The reversal of 12827681 is 18672821.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18672821 = 3593 ⋅5197.

It is an interprime number because it is at equal distance from previous prime (12827669) and next prime (12827693).

It is a cyclic number.

It is not a de Polignac number, because 12827681 - 2¹⁴ = 12811297 is a prime.

It is a super-2 number, since 2×12827681² = 329098799675522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12827081) 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, 1406 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (3208716).

Almost surely, 2^12827681 is an apocalyptic number.

It is an amenable number.

12827681 is a deficient number, since it is larger than the sum of its proper divisors (7183).

12827681 is an equidigital number, since it uses as much as digits as its factorization.

12827681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 10752, while the sum is 35.

The square root of 12827681 is about 3581.5752121099. The cubic root of 12827681 is about 234.0899220963.

The spelling of 12827681 in words is "twelve million, eight hundred twenty-seven thousand, six hundred eighty-one".