285855142 has 16 divisors (see below), whose sum is σ = 440985600. Its totient is φ = 138893832.

The previous prime is 285855137. The next prime is 285855151. The reversal of 285855142 is 241558582.

It is a junction number, because it is equal to n+sod(n) for n = 285855095 and 285855104.

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 7 ways as a sum of consecutive naturals, for example, 8763 + ... + 25465.

It is an arithmetic number, because the mean of its divisors is an integer number (27561600).

Almost surely, 2^285855142 is an apocalyptic number.

285855142 is a deficient number, since it is larger than the sum of its proper divisors (155130458).

285855142 is a wasteful number, since it uses less digits than its factorization.

285855142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16947.

The product of its digits is 128000, while the sum is 40.

The square root of 285855142 is about 16907.2511662896. The cubic root of 285855142 is about 658.7419730487.

The spelling of 285855142 in words is "two hundred eighty-five million, eight hundred fifty-five thousand, one hundred forty-two".