42481021 has 4 divisors (see below), whose sum is σ = 46342944. Its totient is φ = 38619100.

The previous prime is 42481013. The next prime is 42481063. The reversal of 42481021 is 12018424.

42481021 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 42481021 - 2³ = 42481013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42480983 and 42481001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42481921) 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, 1930945 + ... + 1930966.

It is an arithmetic number, because the mean of its divisors is an integer number (11585736).

Almost surely, 2^42481021 is an apocalyptic number.

It is an amenable number.

42481021 is a deficient number, since it is larger than the sum of its proper divisors (3861923).

42481021 is a wasteful number, since it uses less digits than its factorization.

42481021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861922.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 42481021 is about 6517.7466198066. The cubic root of 42481021 is about 348.9246477330.

Adding to 42481021 its reverse (12018424), we get a palindrome (54499445).

The spelling of 42481021 in words is "forty-two million, four hundred eighty-one thousand, twenty-one".