85658 has 4 divisors (see below), whose sum is σ = 128490. Its totient is φ = 42828.

The previous prime is 85643. The next prime is 85661.

85658 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 61009 + 24649 = 247^2 + 157^2 .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21413 + ... + 21416.

2⁸⁵⁶⁵⁸ is an apocalyptic number.

85658 is a deficient number, since it is larger than the sum of its proper divisors (42832).

85658 is a wasteful number, since it uses less digits than its factorization.

85658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42831.

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

The square root of 85658 is about 292.6738799415. The cubic root of 85658 is about 44.0814606626.

The spelling of 85658 in words is "eighty-five thousand, six hundred fifty-eight".