865789142 has 32 divisors (see below), whose sum is σ = 1407697920. Its totient is φ = 398391840.

The previous prime is 865789139. The next prime is 865789151. The reversal of 865789142 is 241987568.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116873 + ... + 124059.

It is an arithmetic number, because the mean of its divisors is an integer number (43990560).

Almost surely, 2^865789142 is an apocalyptic number.

865789142 is a deficient number, since it is larger than the sum of its proper divisors (541908778).

865789142 is a wasteful number, since it uses less digits than its factorization.

865789142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7316.

The product of its digits is 967680, while the sum is 50.

The square root of 865789142 is about 29424.2950977589. The cubic root of 865789142 is about 953.0976051995.

The spelling of 865789142 in words is "eight hundred sixty-five million, seven hundred eighty-nine thousand, one hundred forty-two".