12837681 has 12 divisors (see below), whose sum is σ = 18574452. Its totient is φ = 8544096.

The previous prime is 12837667. The next prime is 12837709. The reversal of 12837681 is 18673821.

12837681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3837681 + 9000000 = 1959^2 + 3000^2 .

It is not a de Polignac number, because 12837681 - 2¹³ = 12829489 is a prime.

It is a super-2 number, since 2×12837681² = 329612106915522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12837641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9415 + ... + 10691.

It is an arithmetic number, because the mean of its divisors is an integer number (1547871).

Almost surely, 2^12837681 is an apocalyptic number.

It is an amenable number.

12837681 is a deficient number, since it is larger than the sum of its proper divisors (5736771).

12837681 is a wasteful number, since it uses less digits than its factorization.

12837681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2397 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12837681 is about 3582.9709739265. The cubic root of 12837681 is about 234.1507356653.

The spelling of 12837681 in words is "twelve million, eight hundred thirty-seven thousand, six hundred eighty-one".