85641457 has 8 divisors (see below), whose sum is σ = 94255200. Its totient is φ = 77165760.

The previous prime is 85641419. The next prime is 85641467. The reversal of 85641457 is 75414658.

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 85641457 - 2⁷ = 85641329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85641467) 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 7 ways as a sum of consecutive naturals, for example, 33207 + ... + 35692.

It is an arithmetic number, because the mean of its divisors is an integer number (11781900).

Almost surely, 2^85641457 is an apocalyptic number.

It is an amenable number.

85641457 is a deficient number, since it is larger than the sum of its proper divisors (8613743).

85641457 is a wasteful number, since it uses less digits than its factorization.

85641457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69023.

The product of its digits is 134400, while the sum is 40.

The square root of 85641457 is about 9254.2669617858. The cubic root of 85641457 is about 440.7862268466.

It can be divided in two parts, 8 and 5641457, that added together give a palindrome (5641465).

The spelling of 85641457 in words is "eighty-five million, six hundred forty-one thousand, four hundred fifty-seven".