12405265 has 16 divisors (see below), whose sum is σ = 15333840. Its totient is φ = 9630720.

The previous prime is 12405221. The next prime is 12405269. The reversal of 12405265 is 56250421.

12405265 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1336336 + 11068929 = 1156^2 + 3327^2 .

It is not a de Polignac number, because 12405265 - 2⁷ = 12405137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12405269) 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 15 ways as a sum of consecutive naturals, for example, 26917 + ... + 27373.

It is an arithmetic number, because the mean of its divisors is an integer number (958365).

Almost surely, 2^12405265 is an apocalyptic number.

It is an amenable number.

12405265 is a deficient number, since it is larger than the sum of its proper divisors (2928575).

12405265 is an equidigital number, since it uses as much as digits as its factorization.

12405265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 12405265 is about 3522.1108727580. The cubic root of 12405265 is about 231.4916597188.

Adding to 12405265 its reverse (56250421), we get a palindrome (68655686).

The spelling of 12405265 in words is "twelve million, four hundred five thousand, two hundred sixty-five".