12668529 has 4 divisors (see below), whose sum is σ = 16891376. Its totient is φ = 8445684.

The previous prime is 12668507. The next prime is 12668533. The reversal of 12668529 is 92586621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12668529 - 2¹³ = 12660337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12668569) 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, 2111419 + ... + 2111424.

It is an arithmetic number, because the mean of its divisors is an integer number (4222844).

Almost surely, 2^12668529 is an apocalyptic number.

It is an amenable number.

12668529 is a deficient number, since it is larger than the sum of its proper divisors (4222847).

12668529 is an equidigital number, since it uses as much as digits as its factorization.

12668529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222846.

The product of its digits is 51840, while the sum is 39.

The square root of 12668529 is about 3559.2877096408. The cubic root of 12668529 is about 233.1177789357.

The spelling of 12668529 in words is "twelve million, six hundred sixty-eight thousand, five hundred twenty-nine".