1605206442 has 32 divisors (see below), whose sum is σ = 3738275712. Its totient is φ = 449976384.

The previous prime is 1605206437. The next prime is 1605206461. The reversal of 1605206442 is 2446025061.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358333 + ... + 362784.

It is an arithmetic number, because the mean of its divisors is an integer number (116821116).

Almost surely, 2^1605206442 is an apocalyptic number.

1605206442 is an abundant number, since it is smaller than the sum of its proper divisors (2133069270).

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

1605206442 is a wasteful number, since it uses less digits than its factorization.

1605206442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721182.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1605206442 is about 40065.0276675307. The cubic root of 1605206442 is about 1170.8743657638.

The spelling of 1605206442 in words is "one billion, six hundred five million, two hundred six thousand, four hundred forty-two".