12689732 has 12 divisors (see below), whose sum is σ = 24225936. Its totient is φ = 5768040.

The previous prime is 12689731. The next prime is 12689771. The reversal of 12689732 is 23798621.

It is a super-2 number, since 2×12689732² = 322058596463648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689731) 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, 144158 + ... + 144245.

It is an arithmetic number, because the mean of its divisors is an integer number (2018828).

Almost surely, 2^12689732 is an apocalyptic number.

It is an amenable number.

12689732 is a deficient number, since it is larger than the sum of its proper divisors (11536204).

12689732 is a wasteful number, since it uses less digits than its factorization.

12689732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288418 (or 288416 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 12689732 is about 3562.2650097936. The cubic root of 12689732 is about 233.2477609113.

Subtracting 12689732 from its reverse (23798621), we obtain a square (11108889 = 3333²).

The spelling of 12689732 in words is "twelve million, six hundred eighty-nine thousand, seven hundred thirty-two".