42745173 has 4 divisors (see below), whose sum is σ = 56993568. Its totient is φ = 28496780.

The previous prime is 42745163. The next prime is 42745177. The reversal of 42745173 is 37154724.

42745173 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42745173 - 2¹⁴ = 42728789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42745177) 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, 7124193 + ... + 7124198.

It is an arithmetic number, because the mean of its divisors is an integer number (14248392).

Almost surely, 2^42745173 is an apocalyptic number.

It is an amenable number.

42745173 is a deficient number, since it is larger than the sum of its proper divisors (14248395).

42745173 is a wasteful number, since it uses less digits than its factorization.

42745173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14248394.

The product of its digits is 23520, while the sum is 33.

The square root of 42745173 is about 6537.9792749748. The cubic root of 42745173 is about 349.6463720786.

Adding to 42745173 its reverse (37154724), we get a palindrome (79899897).

The spelling of 42745173 in words is "forty-two million, seven hundred forty-five thousand, one hundred seventy-three".