12689506 has 8 divisors (see below), whose sum is σ = 19049580. Its totient is φ = 6339648.

The previous prime is 12689477. The next prime is 12689507. The reversal of 12689506 is 60598621.

It can be written as a sum of positive squares in 2 ways, for example, as 8173881 + 4515625 = 2859^2 + 2125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12689506² = 322047125048072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2790 + ... + 5758.

Almost surely, 2^12689506 is an apocalyptic number.

12689506 is a deficient number, since it is larger than the sum of its proper divisors (6360074).

12689506 is a wasteful number, since it uses less digits than its factorization.

12689506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108.

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

The square root of 12689506 is about 3562.2332882617. The cubic root of 12689506 is about 233.2463762142.

The spelling of 12689506 in words is "twelve million, six hundred eighty-nine thousand, five hundred six".