85418 has 4 divisors (see below), whose sum is σ = 128130. Its totient is φ = 42708.

The previous prime is 85411. The next prime is 85427. The reversal of 85418 is 81458.

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., 80089 + 5329 = 283^2 + 73^2 .

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

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (85411) by changing a digit.

85418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353 + ... + 21356.

2⁸⁵⁴¹⁸ is an apocalyptic number.

85418 is a deficient number, since it is larger than the sum of its proper divisors (42712).

85418 is a wasteful number, since it uses less digits than its factorization.

85418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42711.

The product of its digits is 1280, while the sum is 26.

The square root of 85418 is about 292.2635796674. The cubic root of 85418 is about 44.0402524209.

The spelling of 85418 in words is "eighty-five thousand, four hundred eighteen".