205241005 has 8 divisors (see below), whose sum is σ = 248549400. Its totient is φ = 162686016.

The previous prime is 205240913. The next prime is 205241041. The reversal of 205241005 is 500142502.

It can be written as a sum of positive squares in 4 ways, for example, as 86452804 + 118788201 = 9298^2 + 10899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205241005 - 2⁷ = 205240877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187750 + ... + 188839.

It is an arithmetic number, because the mean of its divisors is an integer number (31068675).

Almost surely, 2^205241005 is an apocalyptic number.

It is an amenable number.

205241005 is a deficient number, since it is larger than the sum of its proper divisors (43308395).

205241005 is a wasteful number, since it uses less digits than its factorization.

205241005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376703.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 205241005 is about 14326.2348507903. The cubic root of 205241005 is about 589.8678292464.

Adding to 205241005 its reverse (500142502), we get a palindrome (705383507).

The spelling of 205241005 in words is "two hundred five million, two hundred forty-one thousand, five".