12102516 has 18 divisors (see below), whose sum is σ = 30592562. Its totient is φ = 4034160.

The previous prime is 12102511. The next prime is 12102523. The reversal of 12102516 is 61520121.

It can be written as a sum of positive squares in only one way, i.e., 7817616 + 4284900 = 2796^2 + 2070^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168055 + ... + 168126.

Almost surely, 2^12102516 is an apocalyptic number.

It is an amenable number.

12102516 is an abundant number, since it is smaller than the sum of its proper divisors (18490046).

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

12102516 is a wasteful number, since it uses less digits than its factorization.

12102516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336191 (or 336186 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12102516 is about 3478.8670569598. The cubic root of 12102516 is about 229.5929536458.

Adding to 12102516 its reverse (61520121), we get a palindrome (73622637).

The spelling of 12102516 in words is "twelve million, one hundred two thousand, five hundred sixteen".