85748521 has 4 divisors (see below), whose sum is σ = 86316544. Its totient is φ = 85180500.

The previous prime is 85748513. The next prime is 85748591. The reversal of 85748521 is 12584758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85748521 - 2³ = 85748513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85748591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283785 + ... + 284086.

It is an arithmetic number, because the mean of its divisors is an integer number (21579136).

Almost surely, 2^85748521 is an apocalyptic number.

It is an amenable number.

85748521 is a deficient number, since it is larger than the sum of its proper divisors (568023).

85748521 is a wasteful number, since it uses less digits than its factorization.

85748521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568022.

The product of its digits is 89600, while the sum is 40.

The square root of 85748521 is about 9260.0497298881. The cubic root of 85748521 is about 440.9698321789.

The spelling of 85748521 in words is "eighty-five million, seven hundred forty-eight thousand, five hundred twenty-one".