205194 has 16 divisors (see below), whose sum is σ = 447840. Its totient is φ = 62160.

The previous prime is 205187. The next prime is 205201. The reversal of 205194 is 491502.

It is an interprime number because it is at equal distance from previous prime (205187) and next prime (205201).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 205194.

It is an unprimeable number.

205194 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 in 7 ways as a sum of consecutive naturals, for example, 1489 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (27990).

2²⁰⁵¹⁹⁴ is an apocalyptic number.

205194 is an abundant number, since it is smaller than the sum of its proper divisors (242646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205194 is a wasteful number, since it uses less digits than its factorization.

205194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 205194 is about 452.9834434060. The cubic root of 205194 is about 58.9822794623.

Adding to 205194 its reverse (491502), we get a palindrome (696696).

It can be divided in two parts, 2051 and 94, that added together give a triangular number (2145 = T₆₅).

The spelling of 205194 in words is "two hundred five thousand, one hundred ninety-four".