85128125 has 12 divisors (see below), whose sum is σ = 106407252. Its totient is φ = 68100000.

The previous prime is 85128119. The next prime is 85128133. The reversal of 85128125 is 52182158.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 41396356 + 43731769 = 6434^2 + 6613^2 .

It is not a de Polignac number, because 85128125 - 2¹⁰ = 85127101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85128091 and 85128100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10496 + ... + 16745.

It is an arithmetic number, because the mean of its divisors is an integer number (8867271).

Almost surely, 2^85128125 is an apocalyptic number.

It is an amenable number.

85128125 is a deficient number, since it is larger than the sum of its proper divisors (21279127).

85128125 is an frugal number, since it uses more digits than its factorization.

85128125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27266 (or 27246 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 85128125 is about 9226.4903945108. The cubic root of 85128125 is about 439.9037754456.

The spelling of 85128125 in words is "eighty-five million, one hundred twenty-eight thousand, one hundred twenty-five".