12345516 has 36 divisors (see below), whose sum is σ = 32851000. Its totient is φ = 3898368.

The previous prime is 12345511. The next prime is 12345517. The reversal of 12345516 is 61554321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12345516.

It is not an unprimeable number, because it can be changed into a prime (12345511) 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 11 ways as a sum of consecutive naturals, for example, 8341 + ... + 9708.

Almost surely, 2^12345516 is an apocalyptic number.

It is an amenable number.

12345516 is an abundant number, since it is smaller than the sum of its proper divisors (20505484).

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

12345516 is a wasteful number, since it uses less digits than its factorization.

12345516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18078 (or 18073 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12345516 is about 3513.6186474915. The cubic root of 12345516 is about 231.1194075410.

Adding to 12345516 its reverse (61554321), we get a palindrome (73899837).

The spelling of 12345516 in words is "twelve million, three hundred forty-five thousand, five hundred sixteen".