42081733 has 4 divisors (see below), whose sum is σ = 42256588. Its totient is φ = 41906880.

The previous prime is 42081719. The next prime is 42081773. The reversal of 42081733 is 33718024.

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 28376929 + 13704804 = 5327^2 + 3702^2 .

It is a cyclic number.

It is not a de Polignac number, because 42081733 - 2⁵ = 42081701 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 (42081773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87066 + ... + 87547.

It is an arithmetic number, because the mean of its divisors is an integer number (10564147).

Almost surely, 2^42081733 is an apocalyptic number.

It is an amenable number.

42081733 is a deficient number, since it is larger than the sum of its proper divisors (174855).

42081733 is a wasteful number, since it uses less digits than its factorization.

42081733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174854.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42081733 is about 6487.0434714128. The cubic root of 42081733 is about 347.8279994032.

Adding to 42081733 its reverse (33718024), we get a palindrome (75799757).

The spelling of 42081733 in words is "forty-two million, eighty-one thousand, seven hundred thirty-three".