42544645 has 32 divisors (see below), whose sum is σ = 60520320. Its totient is φ = 28304640.

The previous prime is 42544643. The next prime is 42544651. The reversal of 42544645 is 54644524.

It is not a de Polignac number, because 42544645 - 2¹ = 42544643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42544645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42544643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112066 + ... + 112444.

It is an arithmetic number, because the mean of its divisors is an integer number (1891260).

Almost surely, 2^42544645 is an apocalyptic number.

It is an amenable number.

42544645 is a deficient number, since it is larger than the sum of its proper divisors (17975675).

42544645 is a wasteful number, since it uses less digits than its factorization.

42544645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its digits is 76800, while the sum is 34.

The square root of 42544645 is about 6522.6256216343. The cubic root of 42544645 is about 349.0987561347.

The spelling of 42544645 in words is "forty-two million, five hundred forty-four thousand, six hundred forty-five".