85171045 has 4 divisors (see below), whose sum is σ = 102205260. Its totient is φ = 68136832.

The previous prime is 85171039. The next prime is 85171111. The reversal of 85171045 is 54017158.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60559524 + 24611521 = 7782^2 + 4961^2 .

It is a cyclic number.

It is not a de Polignac number, because 85171045 - 2⁵ = 85171013 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 85170998 and 85171016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8517100 + ... + 8517109.

It is an arithmetic number, because the mean of its divisors is an integer number (25551315).

Almost surely, 2^85171045 is an apocalyptic number.

It is an amenable number.

85171045 is a deficient number, since it is larger than the sum of its proper divisors (17034215).

85171045 is a wasteful number, since it uses less digits than its factorization.

85171045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17034214.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 85171045 is about 9228.8160129022. The cubic root of 85171045 is about 439.9776934284.

The spelling of 85171045 in words is "eighty-five million, one hundred seventy-one thousand, forty-five".