12005689 has 8 divisors (see below), whose sum is σ = 12775968. Its totient is φ = 11242560.

The previous prime is 12005683. The next prime is 12005699. The reversal of 12005689 is 98650021.

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 12005689 - 2¹⁹ = 11481401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12005689.

It is not an unprimeable number, because it can be changed into a prime (12005683) by changing a digit.

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, 1914 + ... + 5260.

It is an arithmetic number, because the mean of its divisors is an integer number (1596996).

Almost surely, 2^12005689 is an apocalyptic number.

It is an amenable number.

12005689 is a deficient number, since it is larger than the sum of its proper divisors (770279).

12005689 is a wasteful number, since it uses less digits than its factorization.

12005689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12005689 is about 3464.9226542594. The cubic root of 12005689 is about 228.9790221244.

It can be divided in two parts, 1200 and 5689, that added together give a square (6889 = 83²).

The spelling of 12005689 in words is "twelve million, five thousand, six hundred eighty-nine".