42122645 has 16 divisors (see below), whose sum is σ = 53982720. Its totient is φ = 31483200.

The previous prime is 42122627. The next prime is 42122681. The reversal of 42122645 is 54622124.

42122645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42122645 - 2¹⁰ = 42121621 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 191 + ... + 9180.

It is an arithmetic number, because the mean of its divisors is an integer number (3373920).

Almost surely, 2^42122645 is an apocalyptic number.

It is an amenable number.

42122645 is a deficient number, since it is larger than the sum of its proper divisors (11860075).

42122645 is a wasteful number, since it uses less digits than its factorization.

42122645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436.

The product of its digits is 3840, while the sum is 26.

The square root of 42122645 is about 6490.1960679166. The cubic root of 42122645 is about 347.9406827379.

Adding to 42122645 its reverse (54622124), we get a palindrome (96744769).

The spelling of 42122645 in words is "forty-two million, one hundred twenty-two thousand, six hundred forty-five".