42945223 has 4 divisors (see below), whose sum is σ = 42959800. Its totient is φ = 42930648.

The previous prime is 42945181. The next prime is 42945233. The reversal of 42945223 is 32254924.

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 42945223 - 2⁹ = 42944711 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 (42945233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (10739950).

Almost surely, 2^42945223 is an apocalyptic number.

42945223 is a deficient number, since it is larger than the sum of its proper divisors (14577).

42945223 is a wasteful number, since it uses less digits than its factorization.

42945223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14576.

The product of its digits is 17280, while the sum is 31.

The square root of 42945223 is about 6553.2604862007. The cubic root of 42945223 is about 350.1909787660.

The spelling of 42945223 in words is "forty-two million, nine hundred forty-five thousand, two hundred twenty-three".