42054521 has 4 divisors (see below), whose sum is σ = 42073344. Its totient is φ = 42035700.

The previous prime is 42054517. The next prime is 42054527. The reversal of 42054521 is 12545024.

It is a happy number.

42054521 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42054521 - 2² = 42054517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42054527) 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, 5525 + ... + 10706.

It is an arithmetic number, because the mean of its divisors is an integer number (10518336).

Almost surely, 2^42054521 is an apocalyptic number.

It is an amenable number.

42054521 is a deficient number, since it is larger than the sum of its proper divisors (18823).

42054521 is a wasteful number, since it uses less digits than its factorization.

42054521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18822.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42054521 is about 6484.9457206672. The cubic root of 42054521 is about 347.7530093322.

Adding to 42054521 its reverse (12545024), we get a palindrome (54599545).

The spelling of 42054521 in words is "forty-two million, fifty-four thousand, five hundred twenty-one".