861365001 has 16 divisors (see below), whose sum is σ = 1325302784. Its totient is φ = 487428624.

The previous prime is 861364997. The next prime is 861365003. The reversal of 861365001 is 100563168.

861365001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861365001 - 2² = 861364997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861365001.

It is not an unprimeable number, because it can be changed into a prime (861365003) 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, 196951 + ... + 201276.

It is an arithmetic number, because the mean of its divisors is an integer number (82831424).

Almost surely, 2^861365001 is an apocalyptic number.

It is an amenable number.

861365001 is a deficient number, since it is larger than the sum of its proper divisors (463937783).

861365001 is a wasteful number, since it uses less digits than its factorization.

861365001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398340.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 861365001 is about 29349.0204436196. The cubic root of 861365001 is about 951.4714044233.

The spelling of 861365001 in words is "eight hundred sixty-one million, three hundred sixty-five thousand, one".