12405965 has 16 divisors (see below), whose sum is σ = 17490816. Its totient is φ = 8328000.

The previous prime is 12405961. The next prime is 12406013. The reversal of 12405965 is 56950421.

It is a happy number.

12405965 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12405965 - 2² = 12405961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7961 + ... + 9390.

It is an arithmetic number, because the mean of its divisors is an integer number (1093176).

Almost surely, 2^12405965 is an apocalyptic number.

It is an amenable number.

12405965 is a deficient number, since it is larger than the sum of its proper divisors (5084851).

12405965 is a wasteful number, since it uses less digits than its factorization.

12405965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 12405965 is about 3522.2102435829. The cubic root of 12405965 is about 231.4960138140.

The spelling of 12405965 in words is "twelve million, four hundred five thousand, nine hundred sixty-five".