85122865 has 8 divisors (see below), whose sum is σ = 102197160. Its totient is φ = 68065152.

The previous prime is 85122853. The next prime is 85122871. The reversal of 85122865 is 56822158.

It can be written as a sum of positive squares in 4 ways, for example, as 1656369 + 83466496 = 1287^2 + 9136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85122865 - 2⁵ = 85122833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16587 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (12774645).

Almost surely, 2^85122865 is an apocalyptic number.

It is an amenable number.

85122865 is a deficient number, since it is larger than the sum of its proper divisors (17074295).

85122865 is a wasteful number, since it uses less digits than its factorization.

85122865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8291.

The product of its digits is 38400, while the sum is 37.

The square root of 85122865 is about 9226.2053413091. The cubic root of 85122865 is about 439.8947148227.

It can be divided in two parts, 851 and 22865, that added together give a square (23716 = 154²).

The spelling of 85122865 in words is "eighty-five million, one hundred twenty-two thousand, eight hundred sixty-five".