42806573 has 4 divisors (see below), whose sum is σ = 42985920. Its totient is φ = 42627228.

The previous prime is 42806557. The next prime is 42806587. The reversal of 42806573 is 37560824.

It is a happy number.

42806573 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42806573 - 2⁴ = 42806557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42806593) 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 3 ways as a sum of consecutive naturals, for example, 89315 + ... + 89792.

It is an arithmetic number, because the mean of its divisors is an integer number (10746480).

Almost surely, 2^42806573 is an apocalyptic number.

It is an amenable number.

42806573 is a deficient number, since it is larger than the sum of its proper divisors (179347).

42806573 is a wasteful number, since it uses less digits than its factorization.

42806573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179346.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 42806573 is about 6542.6732304158. The cubic root of 42806573 is about 349.8137049397.

The spelling of 42806573 in words is "forty-two million, eight hundred six thousand, five hundred seventy-three".