205012134 has 40 divisors (see below), whose sum is σ = 460202688. Its totient is φ = 68214960.

The previous prime is 205012121. The next prime is 205012141. The reversal of 205012134 is 431210502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 159904 + ... + 161180.

Almost surely, 2^205012134 is an apocalyptic number.

205012134 is an abundant number, since it is smaller than the sum of its proper divisors (255190554).

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

205012134 is a wasteful number, since it uses less digits than its factorization.

205012134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 205012134 is about 14318.2447946667. The cubic root of 205012134 is about 589.6484873506.

Adding to 205012134 its reverse (431210502), we get a palindrome (636222636).

The spelling of 205012134 in words is "two hundred five million, twelve thousand, one hundred thirty-four".