85725225 has 18 divisors (see below), whose sum is σ = 153543806. Its totient is φ = 45720000.

The previous prime is 85725223. The next prime is 85725229. The reversal of 85725225 is 52252758.

It can be written as a sum of positive squares in 3 ways, for example, as 1617984 + 84107241 = 1272^2 + 9171^2 .

It is not a de Polignac number, because 85725225 - 2¹ = 85725223 is a prime.

It is a Duffinian number.

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 85725225.

It is not an unprimeable number, because it can be changed into a prime (85725223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 190276 + ... + 190725.

Almost surely, 2^85725225 is an apocalyptic number.

It is an amenable number.

85725225 is a deficient number, since it is larger than the sum of its proper divisors (67818581).

85725225 is a wasteful number, since it uses less digits than its factorization.

85725225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381017 (or 381009 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 85725225 is about 9258.7917678280. The cubic root of 85725225 is about 440.9298946051.

The spelling of 85725225 in words is "eighty-five million, seven hundred twenty-five thousand, two hundred twenty-five".