42945842 has 8 divisors (see below), whose sum is σ = 68208156. Its totient is φ = 20209792.

The previous prime is 42945829. The next prime is 42945869. The reversal of 42945842 is 24854924.

It is a happy number.

42945842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36590401 + 6355441 = 6049^2 + 2521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42945796 and 42945805.

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 3 ways as a sum of consecutive naturals, for example, 631523 + ... + 631590.

Almost surely, 2^42945842 is an apocalyptic number.

42945842 is a deficient number, since it is larger than the sum of its proper divisors (25262314).

42945842 is a wasteful number, since it uses less digits than its factorization.

42945842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263132.

The product of its digits is 92160, while the sum is 38.

The square root of 42945842 is about 6553.3077144294. The cubic root of 42945842 is about 350.1926612750.

The spelling of 42945842 in words is "forty-two million, nine hundred forty-five thousand, eight hundred forty-two".