85164025 has 12 divisors (see below), whose sum is σ = 105874300. Its totient is φ = 67956480.

The previous prime is 85164019. The next prime is 85164029. The reversal of 85164025 is 52046158.

It can be written as a sum of positive squares in 6 ways, for example, as 1056784 + 84107241 = 1028^2 + 9171^2 .

It is not a de Polignac number, because 85164025 - 2⁵ = 85163993 is a prime.

It is a super-2 number, since 2×85164025² = 14505822308401250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85164029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6061 + ... + 14389.

Almost surely, 2^85164025 is an apocalyptic number.

It is an amenable number.

85164025 is a deficient number, since it is larger than the sum of its proper divisors (20710275).

85164025 is a wasteful number, since it uses less digits than its factorization.

85164025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748 (or 8743 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 85164025 is about 9228.4356745875. The cubic root of 85164025 is about 439.9656050938.

The spelling of 85164025 in words is "eighty-five million, one hundred sixty-four thousand, twenty-five".