12117755 has 16 divisors (see below), whose sum is σ = 16045344. Its totient is φ = 8728320.

The previous prime is 12117733. The next prime is 12117779. The reversal of 12117755 is 55771121.

It is not a de Polignac number, because 12117755 - 2¹⁶ = 12052219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392 + ... + 4938.

It is an arithmetic number, because the mean of its divisors is an integer number (1002834).

Almost surely, 2^12117755 is an apocalyptic number.

12117755 is a deficient number, since it is larger than the sum of its proper divisors (3927589).

12117755 is a wasteful number, since it uses less digits than its factorization.

12117755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606.

The product of its digits is 2450, while the sum is 29.

The square root of 12117755 is about 3481.0565924730. The cubic root of 12117755 is about 229.6892779568.

Adding to 12117755 its reverse (55771121), we get a palindrome (67888876).

The spelling of 12117755 in words is "twelve million, one hundred seventeen thousand, seven hundred fifty-five".