42644759 has 4 divisors (see below), whose sum is σ = 44889240. Its totient is φ = 40400280.

The previous prime is 42644741. The next prime is 42644779. The reversal of 42644759 is 95744624.

42644759 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.

It is a cyclic number.

It is not a de Polignac number, because 42644759 - 2¹⁶ = 42579223 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 (42644779) 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, 1122212 + ... + 1122249.

It is an arithmetic number, because the mean of its divisors is an integer number (11222310).

Almost surely, 2^42644759 is an apocalyptic number.

42644759 is a deficient number, since it is larger than the sum of its proper divisors (2244481).

42644759 is a wasteful number, since it uses less digits than its factorization.

42644759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244480.

The product of its digits is 241920, while the sum is 41.

The square root of 42644759 is about 6530.2954757040. The cubic root of 42644759 is about 349.3723690629.

The spelling of 42644759 in words is "forty-two million, six hundred forty-four thousand, seven hundred fifty-nine".