85244257 has 8 divisors (see below), whose sum is σ = 97775936. Its totient is φ = 72801072.

The previous prime is 85244221. The next prime is 85244261. The reversal of 85244257 is 75244258.

It is a happy number.

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 85244257 - 2⁷ = 85244129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85244057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20043 + ... + 23920.

It is an arithmetic number, because the mean of its divisors is an integer number (12221992).

Almost surely, 2^85244257 is an apocalyptic number.

It is an amenable number.

85244257 is a deficient number, since it is larger than the sum of its proper divisors (12531679).

85244257 is a wasteful number, since it uses less digits than its factorization.

85244257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44247.

The product of its digits is 89600, while the sum is 37.

The square root of 85244257 is about 9232.7816501854. The cubic root of 85244257 is about 440.1037238249.

Subtracting from 85244257 its reverse (75244258), we obtain a palindrome (9999999).

The spelling of 85244257 in words is "eighty-five million, two hundred forty-four thousand, two hundred fifty-seven".