12016865 has 16 divisors (see below), whose sum is σ = 16536960. Its totient is φ = 8211840.

The previous prime is 12016861. The next prime is 12016877. The reversal of 12016865 is 56861021.

It is a happy number.

It is not a de Polignac number, because 12016865 - 2² = 12016861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12016861) 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, 17906 + ... + 18564.

It is an arithmetic number, because the mean of its divisors is an integer number (1033560).

Almost surely, 2^12016865 is an apocalyptic number.

It is an amenable number.

12016865 is a deficient number, since it is larger than the sum of its proper divisors (4520095).

12016865 is an equidigital number, since it uses as much as digits as its factorization.

12016865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12016865 is about 3466.5350135258. The cubic root of 12016865 is about 229.0500516696.

Adding to 12016865 its reverse (56861021), we get a palindrome (68877886).

The spelling of 12016865 in words is "twelve million, sixteen thousand, eight hundred sixty-five".