85425161 has 4 divisors (see below), whose sum is σ = 85503300. Its totient is φ = 85347024.

The previous prime is 85425143. The next prime is 85425167. The reversal of 85425161 is 16152458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32775625 + 52649536 = 5725^2 + 7256^2 .

It is a cyclic number.

It is not a de Polignac number, because 85425161 - 2¹⁸ = 85163017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85425167) 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 3 ways as a sum of consecutive naturals, for example, 37406 + ... + 39623.

It is an arithmetic number, because the mean of its divisors is an integer number (21375825).

Almost surely, 2^85425161 is an apocalyptic number.

It is an amenable number.

85425161 is a deficient number, since it is larger than the sum of its proper divisors (78139).

85425161 is a wasteful number, since it uses less digits than its factorization.

85425161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78138.

The product of its digits is 9600, while the sum is 32.

The square root of 85425161 is about 9242.5732888628. The cubic root of 85425161 is about 440.4148308830.

The spelling of 85425161 in words is "eighty-five million, four hundred twenty-five thousand, one hundred sixty-one".