12681369 has 6 divisors (see below), whose sum is σ = 18317546. Its totient is φ = 8454240.

The previous prime is 12681367. The next prime is 12681373. The reversal of 12681369 is 96318621.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 149769 = 3540^2 + 387^2 .

It is not a de Polignac number, because 12681369 - 2¹ = 12681367 is a prime.

It is a super-2 number, since 2×12681369² = 321634239428322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12681367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 704512 + ... + 704529.

Almost surely, 2^12681369 is an apocalyptic number.

It is an amenable number.

12681369 is a deficient number, since it is larger than the sum of its proper divisors (5636177).

12681369 is a wasteful number, since it uses less digits than its factorization.

12681369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409047 (or 1409044 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12681369 is about 3561.0909845158. The cubic root of 12681369 is about 233.1965100339.

The spelling of 12681369 in words is "twelve million, six hundred eighty-one thousand, three hundred sixty-nine".