12129646 has 16 divisors (see below), whose sum is σ = 18517248. Its totient is φ = 5958400.

The previous prime is 12129617. The next prime is 12129659. The reversal of 12129646 is 64692121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43026 + ... + 43306.

It is an arithmetic number, because the mean of its divisors is an integer number (1157328).

Almost surely, 2^12129646 is an apocalyptic number.

12129646 is a deficient number, since it is larger than the sum of its proper divisors (6387602).

12129646 is a wasteful number, since it uses less digits than its factorization.

12129646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its digits is 5184, while the sum is 31.

The square root of 12129646 is about 3482.7641321226. The cubic root of 12129646 is about 229.7643837916.

The spelling of 12129646 in words is "twelve million, one hundred twenty-nine thousand, six hundred forty-six".