12684137 has 4 divisors (see below), whose sum is σ = 12796500. Its totient is φ = 12571776.

The previous prime is 12684127. The next prime is 12684163. The reversal of 12684137 is 73148621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5480281 + 7203856 = 2341^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684137 - 2⁶ = 12684073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12684127) 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, 56012 + ... + 56237.

It is an arithmetic number, because the mean of its divisors is an integer number (3199125).

Almost surely, 2^12684137 is an apocalyptic number.

It is an amenable number.

12684137 is a deficient number, since it is larger than the sum of its proper divisors (112363).

12684137 is a wasteful number, since it uses less digits than its factorization.

12684137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112362.

The product of its digits is 8064, while the sum is 32.

The square root of 12684137 is about 3561.4796082527. The cubic root of 12684137 is about 233.2134756307.

It can be divided in two parts, 12684 and 137, that added together give a palindrome (12821).

The spelling of 12684137 in words is "twelve million, six hundred eighty-four thousand, one hundred thirty-seven".