205005142 has 8 divisors (see below), whose sum is σ = 325596456. Its totient is φ = 96472992.

The previous prime is 205005133. The next prime is 205005167. The reversal of 205005142 is 241500502.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014748 + ... + 3014815.

It is an arithmetic number, because the mean of its divisors is an integer number (40699557).

Almost surely, 2^205005142 is an apocalyptic number.

205005142 is a deficient number, since it is larger than the sum of its proper divisors (120591314).

205005142 is a wasteful number, since it uses less digits than its factorization.

205005142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029582.

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

The square root of 205005142 is about 14318.0006285794. Note that the first 3 decimals coincide. The cubic root of 205005142 is about 589.6417838952.

Adding to 205005142 its reverse (241500502), we get a palindrome (446505644).

The spelling of 205005142 in words is "two hundred five million, five thousand, one hundred forty-two".