42945473 has 4 divisors (see below), whose sum is σ = 42971988. Its totient is φ = 42918960.

The previous prime is 42945467. The next prime is 42945523. The reversal of 42945473 is 37454924.

42945473 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 can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 25573249 = 4168^2 + 5057^2 .

It is a cyclic number.

It is not a de Polignac number, because 42945473 - 2¹⁶ = 42879937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42945443) 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, 10658 + ... + 14123.

It is an arithmetic number, because the mean of its divisors is an integer number (10742997).

Almost surely, 2^42945473 is an apocalyptic number.

It is an amenable number.

42945473 is a deficient number, since it is larger than the sum of its proper divisors (26515).

42945473 is a wasteful number, since it uses less digits than its factorization.

42945473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26514.

The product of its digits is 120960, while the sum is 38.

The square root of 42945473 is about 6553.2795606475. The cubic root of 42945473 is about 350.1916582950.

The spelling of 42945473 in words is "forty-two million, nine hundred forty-five thousand, four hundred seventy-three".