42944513 has 8 divisors (see below), whose sum is σ = 43731336. Its totient is φ = 42163200.

The previous prime is 42944497. The next prime is 42944527. The reversal of 42944513 is 31544924.

It can be written as a sum of positive squares in 4 ways, for example, as 4355569 + 38588944 = 2087^2 + 6212^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42944513 - 2⁴ = 42944497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42944513.

It is not an unprimeable number, because it can be changed into a prime (42944543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16373 + ... + 18813.

It is an arithmetic number, because the mean of its divisors is an integer number (5466417).

Almost surely, 2^42944513 is an apocalyptic number.

It is an amenable number.

42944513 is a deficient number, since it is larger than the sum of its proper divisors (786823).

42944513 is a wasteful number, since it uses less digits than its factorization.

42944513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755.

The product of its digits is 17280, while the sum is 32.

The square root of 42944513 is about 6553.2063144693. The cubic root of 42944513 is about 350.1890488892.

The spelling of 42944513 in words is "forty-two million, nine hundred forty-four thousand, five hundred thirteen".