12031617 has 24 divisors (see below), whose sum is σ = 18300000. Its totient is φ = 7008768.

The previous prime is 12031603. The next prime is 12031619. The reversal of 12031617 is 71613021.

12031617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12031617 - 2⁷ = 12031489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031593 and 12031602.

It is not an unprimeable number, because it can be changed into a prime (12031619) 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, 9009 + ... + 10257.

It is an arithmetic number, because the mean of its divisors is an integer number (762500).

Almost surely, 2^12031617 is an apocalyptic number.

It is an amenable number.

12031617 is a deficient number, since it is larger than the sum of its proper divisors (6268383).

12031617 is a wasteful number, since it uses less digits than its factorization.

12031617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 12031617 is about 3468.6621340223. The cubic root of 12031617 is about 229.1437412365.

Adding to 12031617 its reverse (71613021), we get a palindrome (83644638).

The spelling of 12031617 in words is "twelve million, thirty-one thousand, six hundred seventeen".