42745443 has 16 divisors (see below), whose sum is σ = 61528320. Its totient is φ = 26240544.

The previous prime is 42745433. The next prime is 42745453. The reversal of 42745443 is 34454724.

42745443 is nontrivially palindromic in base 15.

42745443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 6538²-1.

It is an interprime number because it is at equal distance from previous prime (42745433) and next prime (42745453).

It is not a de Polignac number, because 42745443 - 2¹⁷ = 42614371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42745433) 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 15 ways as a sum of consecutive naturals, for example, 18528 + ... + 20706.

It is an arithmetic number, because the mean of its divisors is an integer number (3845520).

Almost surely, 2^42745443 is an apocalyptic number.

42745443 is a deficient number, since it is larger than the sum of its proper divisors (18782877).

42745443 is a wasteful number, since it uses less digits than its factorization.

42745443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698.

The product of its digits is 53760, while the sum is 33.

The square root of 42745443 is about 6537.9999235240. Note that the first 4 decimals coincide. The cubic root of 42745443 is about 349.6471082578.

The spelling of 42745443 in words is "forty-two million, seven hundred forty-five thousand, four hundred forty-three".