865056601 has 4 divisors (see below), whose sum is σ = 870862500. Its totient is φ = 859250704.

The previous prime is 865056589. The next prime is 865056629. The reversal of 865056601 is 106650568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 542890000 + 322166601 = 23300^2 + 17949^2 .

It is a cyclic number.

It is not a de Polignac number, because 865056601 - 2¹⁵ = 865023833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865056641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902726 + ... + 2903023.

It is an arithmetic number, because the mean of its divisors is an integer number (217715625).

Almost surely, 2^865056601 is an apocalyptic number.

It is an amenable number.

865056601 is a deficient number, since it is larger than the sum of its proper divisors (5805899).

865056601 is a wasteful number, since it uses less digits than its factorization.

865056601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805898.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 865056601 is about 29411.8445698327. The cubic root of 865056601 is about 952.8287252296.

The spelling of 865056601 in words is "eight hundred sixty-five million, fifty-six thousand, six hundred one".