12117320 has 32 divisors (see below), whose sum is σ = 28451520. Its totient is φ = 4635840.

The previous prime is 12117319. The next prime is 12117323. The reversal of 12117320 is 2371121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5666 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (889110).

Almost surely, 2^12117320 is an apocalyptic number.

12117320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12117320 is an abundant number, since it is smaller than the sum of its proper divisors (16334200).

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

12117320 is a wasteful number, since it uses less digits than its factorization.

12117320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13205 (or 13201 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12117320 is about 3480.9941108827. The cubic root of 12117320 is about 229.6865294821.

Adding to 12117320 its reverse (2371121), we get a palindrome (14488441).

The spelling of 12117320 in words is "twelve million, one hundred seventeen thousand, three hundred twenty".