42840503 has 4 divisors (see below), whose sum is σ = 42854880. Its totient is φ = 42826128.

The previous prime is 42840491. The next prime is 42840517. The reversal of 42840503 is 30504824.

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 42840503 - 2⁸ = 42840247 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 (42840563) 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, 863 + ... + 9296.

It is an arithmetic number, because the mean of its divisors is an integer number (10713720).

Almost surely, 2^42840503 is an apocalyptic number.

42840503 is a deficient number, since it is larger than the sum of its proper divisors (14377).

42840503 is a wasteful number, since it uses less digits than its factorization.

42840503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14376.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42840503 is about 6545.2656936140. The cubic root of 42840503 is about 349.9061054254.

The spelling of 42840503 in words is "forty-two million, eight hundred forty thousand, five hundred three".