12162505 has 4 divisors (see below), whose sum is σ = 14595012. Its totient is φ = 9730000.

The previous prime is 12162503. The next prime is 12162517. The reversal of 12162505 is 50526121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 9653449 = 1584^2 + 3107^2 .

It is not a de Polignac number, because 12162505 - 2¹ = 12162503 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12162503) 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 3 ways as a sum of consecutive naturals, for example, 1216246 + ... + 1216255.

It is an arithmetic number, because the mean of its divisors is an integer number (3648753).

Almost surely, 2^12162505 is an apocalyptic number.

It is an amenable number.

12162505 is a deficient number, since it is larger than the sum of its proper divisors (2432507).

12162505 is an equidigital number, since it uses as much as digits as its factorization.

12162505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432506.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12162505 is about 3487.4783153448. The cubic root of 12162505 is about 229.9716726297.

Adding to 12162505 its reverse (50526121), we get a palindrome (62688626).

It can be divided in two parts, 1216 and 2505, that added together give a square (3721 = 61²).

The spelling of 12162505 in words is "twelve million, one hundred sixty-two thousand, five hundred five".