12129667 has 8 divisors (see below), whose sum is σ = 13450032. Its totient is φ = 10845600.

The previous prime is 12129661. The next prime is 12129697. The reversal of 12129667 is 76692121.

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

It is a cyclic number.

It is not a de Polignac number, because 12129667 - 2³ = 12129659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12129661) 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 7 ways as a sum of consecutive naturals, for example, 8368 + ... + 9709.

It is an arithmetic number, because the mean of its divisors is an integer number (1681254).

Almost surely, 2^12129667 is an apocalyptic number.

12129667 is a deficient number, since it is larger than the sum of its proper divisors (1320365).

12129667 is a wasteful number, since it uses less digits than its factorization.

12129667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18149.

The product of its digits is 9072, while the sum is 34.

The square root of 12129667 is about 3482.7671469681. The cubic root of 12129667 is about 229.7645163882.

The spelling of 12129667 in words is "twelve million, one hundred twenty-nine thousand, six hundred sixty-seven".