12371681 has 4 divisors (see below), whose sum is σ = 14139072. Its totient is φ = 10604292.

The previous prime is 12371663. The next prime is 12371683. The reversal of 12371681 is 18617321.

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 a de Polignac number, because none of the positive numbers 2^k-12371681 is a prime.

It is a super-2 number, since 2×12371681² = 306116981531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12371683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883685 + ... + 883698.

It is an arithmetic number, because the mean of its divisors is an integer number (3534768).

Almost surely, 2^12371681 is an apocalyptic number.

It is an amenable number.

12371681 is a deficient number, since it is larger than the sum of its proper divisors (1767391).

12371681 is an equidigital number, since it uses as much as digits as its factorization.

12371681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767390.

The product of its digits is 2016, while the sum is 29.

The square root of 12371681 is about 3517.3400461144. The cubic root of 12371681 is about 231.2825699438.

The spelling of 12371681 in words is "twelve million, three hundred seventy-one thousand, six hundred eighty-one".