85765021 has 8 divisors (see below), whose sum is σ = 86534784. Its totient is φ = 84998640.

The previous prime is 85765019. The next prime is 85765033. The reversal of 85765021 is 12056758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85765021 - 2¹ = 85765019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85765061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83491 + ... + 84511.

It is an arithmetic number, because the mean of its divisors is an integer number (10816848).

Almost surely, 2^85765021 is an apocalyptic number.

It is an amenable number.

85765021 is a deficient number, since it is larger than the sum of its proper divisors (769763).

85765021 is a wasteful number, since it uses less digits than its factorization.

85765021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 85765021 is about 9260.9406109747. The cubic root of 85765021 is about 440.9981146321.

The spelling of 85765021 in words is "eighty-five million, seven hundred sixty-five thousand, twenty-one".