865961056 has 12 divisors (see below), whose sum is σ = 1704860892. Its totient is φ = 432980512.

The previous prime is 865961051. The next prime is 865961059. The reversal of 865961056 is 650169568.

It is a junction number, because it is equal to n+sod(n) for n = 865960997 and 865961015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865961051) 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 as a sum of consecutive naturals, namely, 13530610 + ... + 13530673.

It is an arithmetic number, because the mean of its divisors is an integer number (142071741).

Almost surely, 2^865961056 is an apocalyptic number.

It is an amenable number.

865961056 is a deficient number, since it is larger than the sum of its proper divisors (838899836).

865961056 is a wasteful number, since it uses less digits than its factorization.

865961056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27061293 (or 27061285 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 865961056 is about 29427.2162461895. The cubic root of 865961056 is about 953.1606844452.

The spelling of 865961056 in words is "eight hundred sixty-five million, nine hundred sixty-one thousand, fifty-six".