42561973 has 4 divisors (see below), whose sum is σ = 42669580. Its totient is φ = 42454368.

The previous prime is 42561971. The next prime is 42561989. The reversal of 42561973 is 37916524.

42561973 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 2 ways, for example, as 9591409 + 32970564 = 3097^2 + 5742^2 .

It is a cyclic number.

It is not a de Polignac number, because 42561973 - 2¹ = 42561971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42561971) 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, 53208 + ... + 54001.

It is an arithmetic number, because the mean of its divisors is an integer number (10667395).

Almost surely, 2^42561973 is an apocalyptic number.

It is an amenable number.

42561973 is a deficient number, since it is larger than the sum of its proper divisors (107607).

42561973 is a wasteful number, since it uses less digits than its factorization.

42561973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107606.

The product of its digits is 45360, while the sum is 37.

The square root of 42561973 is about 6523.9537858572. The cubic root of 42561973 is about 349.1461444893.

It can be divided in two parts, 42561 and 973, that added together give a palindrome (43534).

The spelling of 42561973 in words is "forty-two million, five hundred sixty-one thousand, nine hundred seventy-three".