85120085 has 4 divisors (see below), whose sum is σ = 102144108. Its totient is φ = 68096064.

The previous prime is 85120081. The next prime is 85120097. The reversal of 85120085 is 58002158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58002158 = 2 ⋅29001079.

It can be written as a sum of positive squares in 2 ways, for example, as 65918161 + 19201924 = 8119^2 + 4382^2 .

It is a cyclic number.

It is not a de Polignac number, because 85120085 - 2² = 85120081 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 (85120081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8512004 + ... + 8512013.

It is an arithmetic number, because the mean of its divisors is an integer number (25536027).

Almost surely, 2^85120085 is an apocalyptic number.

It is an amenable number.

85120085 is a deficient number, since it is larger than the sum of its proper divisors (17024023).

85120085 is a wasteful number, since it uses less digits than its factorization.

85120085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17024022.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 85120085 is about 9226.0546822572. The cubic root of 85120085 is about 439.8899259777.

The spelling of 85120085 in words is "eighty-five million, one hundred twenty thousand, eighty-five".