205605042 has 16 divisors (see below), whose sum is σ = 432852960. Its totient is φ = 64927872.

The previous prime is 205605031. The next prime is 205605077. The reversal of 205605042 is 240506502.

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, 901663 + ... + 901890.

It is an arithmetic number, because the mean of its divisors is an integer number (27053310).

Almost surely, 2^205605042 is an apocalyptic number.

205605042 is an abundant number, since it is smaller than the sum of its proper divisors (227247918).

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

205605042 is a wasteful number, since it uses less digits than its factorization.

205605042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803577.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 205605042 is about 14338.9344792422. The cubic root of 205605042 is about 590.2163737649.

The spelling of 205605042 in words is "two hundred five million, six hundred five thousand, forty-two".