12125565 has 16 divisors (see below), whose sum is σ = 21556800. Its totient is φ = 6466896.

The previous prime is 12125563. The next prime is 12125569. The reversal of 12125565 is 56552121.

It is not a de Polignac number, because 12125565 - 2¹ = 12125563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125563) 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 15 ways as a sum of consecutive naturals, for example, 44775 + ... + 45044.

It is an arithmetic number, because the mean of its divisors is an integer number (1347300).

Almost surely, 2^12125565 is an apocalyptic number.

12125565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12125565 is a deficient number, since it is larger than the sum of its proper divisors (9431235).

12125565 is an equidigital number, since it uses as much as digits as its factorization.

12125565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89833 (or 89827 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 12125565 is about 3482.1781976229. The cubic root of 12125565 is about 229.7386129481.

Adding to 12125565 its reverse (56552121), we get a palindrome (68677686).

The spelling of 12125565 in words is "twelve million, one hundred twenty-five thousand, five hundred sixty-five".