12005705 has 8 divisors (see below), whose sum is σ = 14425992. Its totient is φ = 9591808.

The previous prime is 12005699. The next prime is 12005717. The reversal of 12005705 is 50750021.

12005705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 89401 + 11916304 = 299^2 + 3452^2 .

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 12005705 - 2⁶ = 12005641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5099 + ... + 7071.

It is an arithmetic number, because the mean of its divisors is an integer number (1803249).

Almost surely, 2^12005705 is an apocalyptic number.

It is an amenable number.

12005705 is a deficient number, since it is larger than the sum of its proper divisors (2420287).

12005705 is a wasteful number, since it uses less digits than its factorization.

12005705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 12005705 is about 3464.9249631125. The cubic root of 12005705 is about 228.9791238446.

Adding to 12005705 its reverse (50750021), we get a palindrome (62755726).

The spelling of 12005705 in words is "twelve million, five thousand, seven hundred five".