861025447 has 16 divisors (see below), whose sum is σ = 913554432. Its totient is φ = 809867520.

The previous prime is 861025433. The next prime is 861025471. The reversal of 861025447 is 744520168.

861025447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861025447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861022447) 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, 371422 + ... + 373732.

It is an arithmetic number, because the mean of its divisors is an integer number (57097152).

Almost surely, 2^861025447 is an apocalyptic number.

861025447 is a deficient number, since it is larger than the sum of its proper divisors (52528985).

861025447 is a wasteful number, since it uses less digits than its factorization.

861025447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 861025447 is about 29343.2351147586. The cubic root of 861025447 is about 951.3463632066.

The spelling of 861025447 in words is "eight hundred sixty-one million, twenty-five thousand, four hundred forty-seven".