12117770 has 48 divisors (see below), whose sum is σ = 26524800. Its totient is φ = 3903744.

The previous prime is 12117733. The next prime is 12117779. The reversal of 12117770 is 7771121.

12117770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12117779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19931 + ... + 20529.

It is an arithmetic number, because the mean of its divisors is an integer number (552600).

Almost surely, 2^12117770 is an apocalyptic number.

12117770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12117770 is an abundant number, since it is smaller than the sum of its proper divisors (14407030).

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

12117770 is a wasteful number, since it uses less digits than its factorization.

12117770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 12117770 is about 3481.0587469906. The cubic root of 12117770 is about 229.6893727307.

Adding to 12117770 its reverse (7771121), we get a palindrome (19888891).

The spelling of 12117770 in words is "twelve million, one hundred seventeen thousand, seven hundred seventy".