12005645 has 8 divisors (see below), whose sum is σ = 14426880. Its totient is φ = 9591120.

The previous prime is 12005641. The next prime is 12005659. The reversal of 12005645 is 54650021.

12005645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12005645 - 2² = 12005641 is a prime.

It is a super-3 number, since 3×12005645³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12005645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (1803360).

Almost surely, 2^12005645 is an apocalyptic number.

It is an amenable number.

12005645 is a deficient number, since it is larger than the sum of its proper divisors (2421235).

12005645 is a wasteful number, since it uses less digits than its factorization.

12005645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 12005645 is about 3464.9163049055. The cubic root of 12005645 is about 228.9787423934.

Adding to 12005645 its reverse (54650021), we get a palindrome (66655666).

The spelling of 12005645 in words is "twelve million, five thousand, six hundred forty-five".