12072865 has 12 divisors (see below), whose sum is σ = 16853076. Its totient is φ = 8278368.

The previous prime is 12072803. The next prime is 12072869. The reversal of 12072865 is 56827021.

12072865 is digitally balanced in base 2, 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 2 ways, for example, as 6671889 + 5400976 = 2583^2 + 2324^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12072865 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12072869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24394 + ... + 24883.

It is an arithmetic number, because the mean of its divisors is an integer number (1404423).

Almost surely, 2^12072865 is an apocalyptic number.

It is an amenable number.

12072865 is a deficient number, since it is larger than the sum of its proper divisors (4780211).

12072865 is an equidigital number, since it uses as much as digits as its factorization.

12072865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49296 (or 49289 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 12072865 is about 3474.6028550037. The cubic root of 12072865 is about 229.4053004392.

Adding to 12072865 its reverse (56827021), we get a palindrome (68899886).

The spelling of 12072865 in words is "twelve million, seventy-two thousand, eight hundred sixty-five".