85457 has 4 divisors (see below), whose sum is σ = 86436. Its totient is φ = 84480.

The previous prime is 85453. The next prime is 85469. The reversal of 85457 is 75458.

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 25921 + 59536 = 161^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 85457 - 2² = 85453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344 + ... + 537.

It is an arithmetic number, because the mean of its divisors is an integer number (21609).

2⁸⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

85457 is a deficient number, since it is larger than the sum of its proper divisors (979).

85457 is an equidigital number, since it uses as much as digits as its factorization.

85457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 5600, while the sum is 29.

The square root of 85457 is about 292.3302926486. The cubic root of 85457 is about 44.0469540081.

Subtracting from 85457 its reverse (75458), we obtain a palindrome (9999).

The spelling of 85457 in words is "eighty-five thousand, four hundred fifty-seven".