205442642 has 8 divisors (see below), whose sum is σ = 318104832. Its totient is φ = 99407700.

The previous prime is 205442639. The next prime is 205442651. The reversal of 205442642 is 246244502.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656734 + ... + 1656857.

It is an arithmetic number, because the mean of its divisors is an integer number (39763104).

Almost surely, 2^205442642 is an apocalyptic number.

205442642 is a deficient number, since it is larger than the sum of its proper divisors (112662190).

205442642 is a wasteful number, since it uses less digits than its factorization.

205442642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313624.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 205442642 is about 14333.2704572264. The cubic root of 205442642 is about 590.0609359642.

The spelling of 205442642 in words is "two hundred five million, four hundred forty-two thousand, six hundred forty-two".