845047042 has 64 divisors (see below), whose sum is σ = 1548288000. Its totient is φ = 345355920.

The previous prime is 845047031. The next prime is 845047057. The reversal of 845047042 is 240740548.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 845046989 and 845047007.

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 31 ways as a sum of consecutive naturals, for example, 1679763 + ... + 1680265.

It is an arithmetic number, because the mean of its divisors is an integer number (24192000).

Almost surely, 2^845047042 is an apocalyptic number.

845047042 is a deficient number, since it is larger than the sum of its proper divisors (703240958).

845047042 is a wasteful number, since it uses less digits than its factorization.

845047042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 845047042 is about 29069.6928432345. The cubic root of 845047042 is about 945.4247381959.

The spelling of 845047042 in words is "eight hundred forty-five million, forty-seven thousand, forty-two".