205040142 has 12 divisors (see below), whose sum is σ = 444253680. Its totient is φ = 68346708.

The previous prime is 205040117. The next prime is 205040159. The reversal of 205040142 is 241040502.

205040142 is a `hidden beast` number, since 20 + 504 + 0 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11391119 = 205040142 / (2 + 0 + 5 + 0 + 4 + 0 + 1 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5695542 + ... + 5695577.

It is an arithmetic number, because the mean of its divisors is an integer number (37021140).

Almost surely, 2^205040142 is an apocalyptic number.

205040142 is an abundant number, since it is smaller than the sum of its proper divisors (239213538).

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

205040142 is a wasteful number, since it uses less digits than its factorization.

205040142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11391127 (or 11391124 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 205040142 is about 14319.2228141055. Note that the first 3 decimals coincide. The cubic root of 205040142 is about 589.6753379935.

Adding to 205040142 its reverse (241040502), we get a palindrome (446080644).

The spelling of 205040142 in words is "two hundred five million, forty thousand, one hundred forty-two".