1605205242 has 32 divisors (see below), whose sum is σ = 3585072000. Its totient is φ = 532376064.

The previous prime is 1605205211. The next prime is 1605205247. The reversal of 1605205242 is 2425025061.

1605205242 is a `hidden beast` number, since 1 + 605 + 2 + 0 + 52 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1605205247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63943 + ... + 85434.

It is an arithmetic number, because the mean of its divisors is an integer number (112033500).

Almost surely, 2^1605205242 is an apocalyptic number.

1605205242 is an abundant number, since it is smaller than the sum of its proper divisors (1979866758).

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

1605205242 is a wasteful number, since it uses less digits than its factorization.

1605205242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149587 (or 149581 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1605205242 is about 40065.0126918737. The cubic root of 1605205242 is about 1170.8740739946.

The spelling of 1605205242 in words is "one billion, six hundred five million, two hundred five thousand, two hundred forty-two".