12516165 has 24 divisors (see below), whose sum is σ = 22972248. Its totient is φ = 6282240.

The previous prime is 12516137. The next prime is 12516169. The reversal of 12516165 is 56161521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1979649 + 10536516 = 1407^2 + 3246^2 .

It is not a de Polignac number, because 12516165 - 2⁷ = 12516037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516169) 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, 7416 + ... + 8945.

It is an arithmetic number, because the mean of its divisors is an integer number (957177).

Almost surely, 2^12516165 is an apocalyptic number.

12516165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12516165 is a deficient number, since it is larger than the sum of its proper divisors (10456083).

12516165 is a wasteful number, since it uses less digits than its factorization.

12516165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389 (or 16386 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12516165 is about 3537.8192435454. The cubic root of 12516165 is about 232.1794402983.

Adding to 12516165 its reverse (56161521), we get a palindrome (68677686).

It can be divided in two parts, 125 and 16165, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 12516165 in words is "twelve million, five hundred sixteen thousand, one hundred sixty-five".