12117786 has 16 divisors (see below), whose sum is σ = 24279264. Its totient is φ = 4031984.

The previous prime is 12117779. The next prime is 12117793. The reversal of 12117786 is 68771121.

It is an interprime number because it is at equal distance from previous prime (12117779) and next prime (12117793).

It is a Curzon number.

It is an unprimeable number.

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, 2620 + ... + 5576.

It is an arithmetic number, because the mean of its divisors is an integer number (1517454).

Almost surely, 2^12117786 is an apocalyptic number.

12117786 is an abundant number, since it is smaller than the sum of its proper divisors (12161478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12117786 is a wasteful number, since it uses less digits than its factorization.

12117786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645.

The product of its digits is 4704, while the sum is 33.

The square root of 12117786 is about 3481.0610451413. The cubic root of 12117786 is about 229.6894738226.

The spelling of 12117786 in words is "twelve million, one hundred seventeen thousand, seven hundred eighty-six".