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85018 = 242509
BaseRepresentation
bin10100110000011010
311022121211
4110300122
510210033
61453334
7502603
oct246032
9138554
1085018
115896a
124124a
132c90b
1422daa
151a2cd
hex14c1a

85018 has 4 divisors (see below), whose sum is σ = 127530. Its totient is φ = 42508.

The previous prime is 85009. The next prime is 85021. The reversal of 85018 is 81058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81058 = 240529.

It can be written as a sum of positive squares in only one way, i.e., 51529 + 33489 = 227^2 + 183^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 85018.

It is an unprimeable number.

85018 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21253 + ... + 21256.

285018 is an apocalyptic number.

85018 is a deficient number, since it is larger than the sum of its proper divisors (42512).

85018 is a wasteful number, since it uses less digits than its factorization.

85018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42511.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 85018 is about 291.5784628535. The cubic root of 85018 is about 43.9714001470.

It can be divided in two parts, 850 and 18, that added together give a palindrome (868).

The spelling of 85018 in words is "eighty-five thousand, eighteen".

Divisors: 1 2 42509 85018