85906 has 4 divisors (see below), whose sum is σ = 128862.
Its totient is φ = 42952.
The previous prime is 85903. The next prime is 85909. The reversal of 85906 is 60958.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (85903) and next prime (85909).
It can be written as a sum of positive squares in only one way, i.e., 84681 + 1225 = 291^2 + 35^2
It is a pancake number, because a pancake can be divided into 85906 parts by 414 straight cuts.
It is not an unprimeable number, because it can be changed into a prime (85903) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21475 + ... + 21478.
285906 is an apocalyptic number.
85906 is a deficient number, since it is larger than the sum of its proper divisors (42956).
85906 is a wasteful number, since it uses less digits than its factorization.
85906 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 42955.
The product of its (nonzero) digits is 2160, while the sum is 28.
The square root of 85906 is about 293.0972534842.
The cubic root of 85906 is about 44.1239617279.
The spelling of 85906 in words is "eighty-five thousand, nine hundred six".