85242839 has 16 divisors (see below), whose sum is σ = 96377856. Its totient is φ = 74692800.

The previous prime is 85242799. The next prime is 85242841. The reversal of 85242839 is 93824258.

It is a cyclic number.

It is not a de Polignac number, because 85242839 - 2⁸ = 85242583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85242796 and 85242805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85242139) 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, 155564 + ... + 156110.

It is an arithmetic number, because the mean of its divisors is an integer number (6023616).

Almost surely, 2^85242839 is an apocalyptic number.

85242839 is a deficient number, since it is larger than the sum of its proper divisors (11135017).

85242839 is a wasteful number, since it uses less digits than its factorization.

85242839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046.

The product of its digits is 138240, while the sum is 41.

The square root of 85242839 is about 9232.7048582742. The cubic root of 85242839 is about 440.1012835020.

The spelling of 85242839 in words is "eighty-five million, two hundred forty-two thousand, eight hundred thirty-nine".