205205142 has 16 divisors (see below), whose sum is σ = 410551920. Its totient is φ = 68378112.

The previous prime is 205205069. The next prime is 205205171. The reversal of 205205142 is 241502502.

It is a happy number.

It is a congruent 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, 27334 + ... + 34022.

It is an arithmetic number, because the mean of its divisors is an integer number (25659495).

Almost surely, 2^205205142 is an apocalyptic number.

205205142 is an abundant number, since it is smaller than the sum of its proper divisors (205346778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205205142 is a wasteful number, since it uses less digits than its factorization.

205205142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 205205142 is about 14324.9831413513. The cubic root of 205205142 is about 589.8334701893.

Adding to 205205142 its reverse (241502502), we get a palindrome (446707644).

The spelling of 205205142 in words is "two hundred five million, two hundred five thousand, one hundred forty-two".