205124042 has 16 divisors (see below), whose sum is σ = 313159392. Its totient is φ = 100751760.

The previous prime is 205124039. The next prime is 205124063. The reversal of 205124042 is 240421502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26633 + ... + 33459.

It is an arithmetic number, because the mean of its divisors is an integer number (19572462).

Almost surely, 2^205124042 is an apocalyptic number.

205124042 is a deficient number, since it is larger than the sum of its proper divisors (108035350).

205124042 is a wasteful number, since it uses less digits than its factorization.

205124042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 205124042 is about 14322.1521427473. The cubic root of 205124042 is about 589.7557564161.

Adding to 205124042 its reverse (240421502), we get a palindrome (445545544).

The spelling of 205124042 in words is "two hundred five million, one hundred twenty-four thousand, forty-two".