205006 has 4 divisors (see below), whose sum is σ = 307512. Its totient is φ = 102502.

The previous prime is 204983. The next prime is 205019. The reversal of 205006 is 600502.

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

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

205006 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, 51250 + ... + 51253.

It is an arithmetic number, because the mean of its divisors is an integer number (76878).

2²⁰⁵⁰⁰⁶ is an apocalyptic number.

205006 is a deficient number, since it is larger than the sum of its proper divisors (102506).

205006 is a wasteful number, since it uses less digits than its factorization.

205006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102505.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 205006 is about 452.7758827500. The cubic root of 205006 is about 58.9642606496.

Adding to 205006 its reverse (600502), we get a palindrome (805508).

The spelling of 205006 in words is "two hundred five thousand, six".