42681243 has 32 divisors (see below), whose sum is σ = 64995840. Its totient is φ = 24675840.

The previous prime is 42681229. The next prime is 42681253. The reversal of 42681243 is 34218624.

42681243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42681243 - 2⁴ = 42681227 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42681243.

It is not an unprimeable number, because it can be changed into a prime (42681253) 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 31 ways as a sum of consecutive naturals, for example, 98355 + ... + 98787.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^42681243 is an apocalyptic number.

42681243 is a deficient number, since it is larger than the sum of its proper divisors (22314597).

42681243 is a wasteful number, since it uses less digits than its factorization.

42681243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 9216, while the sum is 30.

The square root of 42681243 is about 6533.0883202357. The cubic root of 42681243 is about 349.4719738641.

Adding to 42681243 its reverse (34218624), we get a palindrome (76899867).

It can be divided in two parts, 42681 and 243, that added together give a palindrome (42924).

The spelling of 42681243 in words is "forty-two million, six hundred eighty-one thousand, two hundred forty-three".