205142565 has 8 divisors (see below), whose sum is σ = 328228128. Its totient is φ = 109409360.

The previous prime is 205142521. The next prime is 205142569. The reversal of 205142565 is 565241502.

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

It is not a de Polignac number, because 205142565 - 2⁸ = 205142309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205142569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6838071 + ... + 6838100.

It is an arithmetic number, because the mean of its divisors is an integer number (41028516).

Almost surely, 2^205142565 is an apocalyptic number.

It is an amenable number.

205142565 is a deficient number, since it is larger than the sum of its proper divisors (123085563).

205142565 is a wasteful number, since it uses less digits than its factorization.

205142565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13676179.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 205142565 is about 14322.7987837573. The cubic root of 205142565 is about 589.7735078166.

The spelling of 205142565 in words is "two hundred five million, one hundred forty-two thousand, five hundred sixty-five".