12161705 has 8 divisors (see below), whose sum is σ = 14641992. Its totient is φ = 9697408.

The previous prime is 12161689. The next prime is 12161711. The reversal of 12161705 is 50716121.

12161705 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 162409 + 11999296 = 403^2 + 3464^2 .

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 12161705 - 2⁴ = 12161689 is a prime.

It is a Duffinian 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, 2252 + ... + 5421.

It is an arithmetic number, because the mean of its divisors is an integer number (1830249).

Almost surely, 2^12161705 is an apocalyptic number.

It is an amenable number.

12161705 is a deficient number, since it is larger than the sum of its proper divisors (2480287).

12161705 is an equidigital number, since it uses as much as digits as its factorization.

12161705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 12161705 is about 3487.3636174050. The cubic root of 12161705 is about 229.9666303195.

Adding to 12161705 its reverse (50716121), we get a palindrome (62877826).

The spelling of 12161705 in words is "twelve million, one hundred sixty-one thousand, seven hundred five".