42173903 has 4 divisors (see below), whose sum is σ = 42194760. Its totient is φ = 42153048.

The previous prime is 42173897. The next prime is 42173921. The reversal of 42173903 is 30937124.

42173903 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 42173903 - 2⁸ = 42173647 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 (42173603) 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, 7025 + ... + 11562.

It is an arithmetic number, because the mean of its divisors is an integer number (10548690).

Almost surely, 2^42173903 is an apocalyptic number.

42173903 is a deficient number, since it is larger than the sum of its proper divisors (20857).

42173903 is a wasteful number, since it uses less digits than its factorization.

42173903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20856.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 42173903 is about 6494.1437464842. The cubic root of 42173903 is about 348.0817589862.

The spelling of 42173903 in words is "forty-two million, one hundred seventy-three thousand, nine hundred three".