85255785 has 24 divisors (see below), whose sum is σ = 148866120. Its totient is φ = 45134592.

The previous prime is 85255783. The next prime is 85255811. The reversal of 85255785 is 58755258.

It can be written as a sum of positive squares in 4 ways, for example, as 2518569 + 82737216 = 1587^2 + 9096^2 .

It is not a de Polignac number, because 85255785 - 2¹ = 85255783 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85255785.

It is not an unprimeable number, because it can be changed into a prime (85255783) 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, 750 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (6202755).

Almost surely, 2^85255785 is an apocalyptic number.

It is an amenable number.

85255785 is a deficient number, since it is larger than the sum of its proper divisors (63610335).

85255785 is a wasteful number, since it uses less digits than its factorization.

85255785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13977 (or 13974 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The square root of 85255785 is about 9233.4059263091. The cubic root of 85255785 is about 440.1235620608.

The spelling of 85255785 in words is "eighty-five million, two hundred fifty-five thousand, seven hundred eighty-five".