85105725 has 24 divisors (see below), whose sum is σ = 140988000. Its totient is φ = 45299520.

The previous prime is 85105721. The next prime is 85105777. The reversal of 85105725 is 52750158.

It is a happy number.

It is not a de Polignac number, because 85105725 - 2² = 85105721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85105721) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 56026 + ... + 57524.

It is an arithmetic number, because the mean of its divisors is an integer number (5874500).

Almost surely, 2^85105725 is an apocalyptic number.

It is an amenable number.

85105725 is a deficient number, since it is larger than the sum of its proper divisors (55882275).

85105725 is a wasteful number, since it uses less digits than its factorization.

85105725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 85105725 is about 9225.2764186229. The cubic root of 85105725 is about 439.8651876933.

The spelling of 85105725 in words is "eighty-five million, one hundred five thousand, seven hundred twenty-five".