42540803 has 4 divisors (see below), whose sum is σ = 43530168. Its totient is φ = 41551440.

The previous prime is 42540793. The next prime is 42540833. The reversal of 42540803 is 30804524.

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 42540803 - 2¹⁰ = 42539779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42540833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494618 + ... + 494703.

It is an arithmetic number, because the mean of its divisors is an integer number (10882542).

Almost surely, 2^42540803 is an apocalyptic number.

42540803 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42540803 is a deficient number, since it is larger than the sum of its proper divisors (989365).

42540803 is an equidigital number, since it uses as much as digits as its factorization.

42540803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989364.

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

The square root of 42540803 is about 6522.3311016844. The cubic root of 42540803 is about 349.0882473480.

The spelling of 42540803 in words is "forty-two million, five hundred forty thousand, eight hundred three".