42022621 has 4 divisors (see below), whose sum is σ = 42037600. Its totient is φ = 42007644.

The previous prime is 42022609. The next prime is 42022637. The reversal of 42022621 is 12622024.

42022621 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 42022621 - 2¹⁵ = 41989853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42022681) 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, 1881 + ... + 9358.

It is an arithmetic number, because the mean of its divisors is an integer number (10509400).

Almost surely, 2^42022621 is an apocalyptic number.

It is an amenable number.

42022621 is a deficient number, since it is larger than the sum of its proper divisors (14979).

42022621 is a wasteful number, since it uses less digits than its factorization.

42022621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14978.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42022621 is about 6482.4857115153. The cubic root of 42022621 is about 347.6650590015.

Adding to 42022621 its reverse (12622024), we get a palindrome (54644645).

The spelling of 42022621 in words is "forty-two million, twenty-two thousand, six hundred twenty-one".