85042855 has 4 divisors (see below), whose sum is σ = 102051432. Its totient is φ = 68034280.

The previous prime is 85042847. The next prime is 85042871. The reversal of 85042855 is 55824058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55824058 = 2 ⋅27912029.

It is not a de Polignac number, because 85042855 - 2³ = 85042847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 8504281 + ... + 8504290.

It is an arithmetic number, because the mean of its divisors is an integer number (25512858).

Almost surely, 2^85042855 is an apocalyptic number.

85042855 is a deficient number, since it is larger than the sum of its proper divisors (17008577).

85042855 is a wasteful number, since it uses less digits than its factorization.

85042855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17008576.

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 85042855 is about 9221.8683031152. The cubic root of 85042855 is about 439.7568474032.

The spelling of 85042855 in words is "eighty-five million, forty-two thousand, eight hundred fifty-five".