85099725 has 36 divisors (see below), whose sum is σ = 152919156. Its totient is φ = 45239040.

The previous prime is 85099673. The next prime is 85099783. The reversal of 85099725 is 52799058.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 44916804 + 40182921 = 6702^2 + 6339^2 .

It is not a de Polignac number, because 85099725 - 2⁶ = 85099661 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 137617 + ... + 138233.

Almost surely, 2^85099725 is an apocalyptic number.

It is an amenable number.

85099725 is a deficient number, since it is larger than the sum of its proper divisors (67819431).

85099725 is a wasteful number, since it uses less digits than its factorization.

85099725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 85099725 is about 9224.9512193832. The cubic root of 85099725 is about 439.8548505386.

The spelling of 85099725 in words is "eighty-five million, ninety-nine thousand, seven hundred twenty-five".