42813021 has 8 divisors (see below), whose sum is σ = 60441984. Its totient is φ = 26863040.

The previous prime is 42813011. The next prime is 42813047. The reversal of 42813021 is 12031824.

42813021 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 cyclic number.

It is not a de Polignac number, because 42813021 - 2⁵ = 42812989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42813011) 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, 419685 + ... + 419786.

It is an arithmetic number, because the mean of its divisors is an integer number (7555248).

Almost surely, 2^42813021 is an apocalyptic number.

It is an amenable number.

42813021 is a deficient number, since it is larger than the sum of its proper divisors (17628963).

42813021 is a wasteful number, since it uses less digits than its factorization.

42813021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839491.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42813021 is about 6543.1659768036. The cubic root of 42813021 is about 349.8312683290.

Adding to 42813021 its reverse (12031824), we get a palindrome (54844845).

The spelling of 42813021 in words is "forty-two million, eight hundred thirteen thousand, twenty-one".