42640873 has 8 divisors (see below), whose sum is σ = 48540096. Its totient is φ = 37078800.

The previous prime is 42640859. The next prime is 42640901. The reversal of 42640873 is 37804624.

42640873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-42640873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42640823) by changing a digit.

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, 84018 + ... + 84523.

It is an arithmetic number, because the mean of its divisors is an integer number (6067512).

Almost surely, 2^42640873 is an apocalyptic number.

It is an amenable number.

42640873 is a deficient number, since it is larger than the sum of its proper divisors (5899223).

42640873 is a wasteful number, since it uses less digits than its factorization.

42640873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168575.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 42640873 is about 6529.9979326184. The cubic root of 42640873 is about 349.3617565648.

The spelling of 42640873 in words is "forty-two million, six hundred forty thousand, eight hundred seventy-three".