12017320 has 64 divisors (see below), whose sum is σ = 31207680. Its totient is φ = 4079616.

The previous prime is 12017303. The next prime is 12017353. The reversal of 12017320 is 2371021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12017294 and 12017303.

It is a congruent 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, 46632 + ... + 46888.

It is an arithmetic number, because the mean of its divisors is an integer number (487620).

Almost surely, 2^12017320 is an apocalyptic number.

12017320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12017320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15603840).

12017320 is an abundant number, since it is smaller than the sum of its proper divisors (19190360).

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

12017320 is a wasteful number, since it uses less digits than its factorization.

12017320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 12017320 is about 3466.6006403969. The cubic root of 12017320 is about 229.0529425084.

Adding to 12017320 its reverse (2371021), we get a palindrome (14388341).

The spelling of 12017320 in words is "twelve million, seventeen thousand, three hundred twenty".