42503421 has 8 divisors (see below), whose sum is σ = 56968704. Its totient is φ = 28186880.

The previous prime is 42503413. The next prime is 42503441. The reversal of 42503421 is 12430524.

42503421 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 42503421 - 2³ = 42503413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42503401) 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, 36516 + ... + 37661.

It is an arithmetic number, because the mean of its divisors is an integer number (7121088).

Almost surely, 2^42503421 is an apocalyptic number.

It is an amenable number.

42503421 is a deficient number, since it is larger than the sum of its proper divisors (14465283).

42503421 is a wasteful number, since it uses less digits than its factorization.

42503421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74371.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42503421 is about 6519.4647786456. The cubic root of 42503421 is about 348.9859656154.

Adding to 42503421 its reverse (12430524), we get a palindrome (54933945).

It can be divided in two parts, 42503 and 421, that added together give a palindrome (42924).

The spelling of 42503421 in words is "forty-two million, five hundred three thousand, four hundred twenty-one".