12550865 has 8 divisors (see below), whose sum is σ = 15116328. Its totient is φ = 10003840.

The previous prime is 12550861. The next prime is 12550873. The reversal of 12550865 is 56805521.

It can be written as a sum of positive squares in 4 ways, for example, as 984064 + 11566801 = 992^2 + 3401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12550865 - 2² = 12550861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12550861) 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 7 ways as a sum of consecutive naturals, for example, 3062 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1889541).

Almost surely, 2^12550865 is an apocalyptic number.

It is an amenable number.

12550865 is a deficient number, since it is larger than the sum of its proper divisors (2565463).

12550865 is an equidigital number, since it uses as much as digits as its factorization.

12550865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 12550865 is about 3542.7200002258. The cubic root of 12550865 is about 232.3938082134.

The spelling of 12550865 in words is "twelve million, five hundred fifty thousand, eight hundred sixty-five".