865142685 has 24 divisors (see below), whose sum is σ = 1635907104. Its totient is φ = 419462880.

The previous prime is 865142683. The next prime is 865142689. The reversal of 865142685 is 586241568.

865142685 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 865142685 - 2¹ = 865142683 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 865142685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865142683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 873387 + ... + 874376.

It is an arithmetic number, because the mean of its divisors is an integer number (68162796).

Almost surely, 2^865142685 is an apocalyptic number.

It is an amenable number.

865142685 is a deficient number, since it is larger than the sum of its proper divisors (770764419).

865142685 is a wasteful number, since it uses less digits than its factorization.

865142685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747785 (or 1747782 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 865142685 is about 29413.3079574535. The cubic root of 865142685 is about 952.8603303243.

The spelling of 865142685 in words is "eight hundred sixty-five million, one hundred forty-two thousand, six hundred eighty-five".