840032042 has 4 divisors (see below), whose sum is σ = 1260048066. Its totient is φ = 420016020.

The previous prime is 840032023. The next prime is 840032057. The reversal of 840032042 is 240230048.

840032042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 833534641 + 6497401 = 28871^2 + 2549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 840031999 and 840032017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210008009 + ... + 210008012.

Almost surely, 2^840032042 is an apocalyptic number.

840032042 is a deficient number, since it is larger than the sum of its proper divisors (420016024).

840032042 is a wasteful number, since it uses less digits than its factorization.

840032042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420016023.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 840032042 is about 28983.3062641238. The cubic root of 840032042 is about 943.5507930814.

The spelling of 840032042 in words is "eight hundred forty million, thirty-two thousand, forty-two".