12506689 has 16 divisors (see below), whose sum is σ = 13914432. Its totient is φ = 11170368.

The previous prime is 12506677. The next prime is 12506699. The reversal of 12506689 is 98660521.

It is a cyclic number.

It is not a de Polignac number, because 12506689 - 2⁷ = 12506561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12506699) 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 15 ways as a sum of consecutive naturals, for example, 72207 + ... + 72379.

It is an arithmetic number, because the mean of its divisors is an integer number (869652).

Almost surely, 2^12506689 is an apocalyptic number.

It is an amenable number.

12506689 is a deficient number, since it is larger than the sum of its proper divisors (1407743).

12506689 is a wasteful number, since it uses less digits than its factorization.

12506689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 12506689 is about 3536.4797468669. The cubic root of 12506689 is about 232.1208310824.

The spelling of 12506689 in words is "twelve million, five hundred six thousand, six hundred eighty-nine".