85125169 has 4 divisors (see below), whose sum is σ = 85617396. Its totient is φ = 84632944.

The previous prime is 85125167. The next prime is 85125181. The reversal of 85125169 is 96152158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96152158 = 2 ⋅48076079.

It can be written as a sum of positive squares in 2 ways, for example, as 33500944 + 51624225 = 5788^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 85125169 - 2¹ = 85125167 is a prime.

It is a super-2 number, since 2×85125169² = 14492588794557122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85125167) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 245854 + ... + 246199.

It is an arithmetic number, because the mean of its divisors is an integer number (21404349).

Almost surely, 2^85125169 is an apocalyptic number.

It is an amenable number.

85125169 is a deficient number, since it is larger than the sum of its proper divisors (492227).

85125169 is a wasteful number, since it uses less digits than its factorization.

85125169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492226.

The product of its digits is 21600, while the sum is 37.

The square root of 85125169 is about 9226.3302021985. The cubic root of 85125169 is about 439.8986836282.

The spelling of 85125169 in words is "eighty-five million, one hundred twenty-five thousand, one hundred sixty-nine".