85242891 has 4 divisors (see below), whose sum is σ = 113657192. Its totient is φ = 56828592.

The previous prime is 85242841. The next prime is 85242893. The reversal of 85242891 is 19824258.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85242891 - 2⁷ = 85242763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85242893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14207146 + ... + 14207151.

It is an arithmetic number, because the mean of its divisors is an integer number (28414298).

Almost surely, 2^85242891 is an apocalyptic number.

85242891 is a deficient number, since it is larger than the sum of its proper divisors (28414301).

85242891 is a wasteful number, since it uses less digits than its factorization.

85242891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28414300.

The product of its digits is 46080, while the sum is 39.

The square root of 85242891 is about 9232.7076743499. The cubic root of 85242891 is about 440.1013729924.

The spelling of 85242891 in words is "eighty-five million, two hundred forty-two thousand, eight hundred ninety-one".