85123 has 4 divisors (see below), whose sum is σ = 88848. Its totient is φ = 81400.

The previous prime is 85121. The next prime is 85133. The reversal of 85123 is 32158.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85123 - 2¹ = 85121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85123.

It is not an unprimeable number, because it can be changed into a prime (85121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1828 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (22212).

2⁸⁵¹²³ is an apocalyptic number.

85123 is a deficient number, since it is larger than the sum of its proper divisors (3725).

85123 is a wasteful number, since it uses less digits than its factorization.

85123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724.

The product of its digits is 240, while the sum is 19.

The square root of 85123 is about 291.7584617453. The cubic root of 85123 is about 43.9894947372.

It can be divided in two parts, 8512 and 3, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 85123 in words is "eighty-five thousand, one hundred twenty-three".