42024421 has 4 divisors (see below), whose sum is σ = 42600172. Its totient is φ = 41448672.

The previous prime is 42024401. The next prime is 42024457. The reversal of 42024421 is 12442024.

42024421 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 7344100 + 34680321 = 2710^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 42024421 - 2⁷ = 42024293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42024401) 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, 287766 + ... + 287911.

It is an arithmetic number, because the mean of its divisors is an integer number (10650043).

Almost surely, 2^42024421 is an apocalyptic number.

It is an amenable number.

42024421 is a deficient number, since it is larger than the sum of its proper divisors (575751).

42024421 is an equidigital number, since it uses as much as digits as its factorization.

42024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575750.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42024421 is about 6482.6245456605. The cubic root of 42024421 is about 347.6700229007.

Adding to 42024421 its reverse (12442024), we get a palindrome (54466445).

The spelling of 42024421 in words is "forty-two million, twenty-four thousand, four hundred twenty-one".