42903565 has 4 divisors (see below), whose sum is σ = 51484284. Its totient is φ = 34322848.

The previous prime is 42903559. The next prime is 42903571. The reversal of 42903565 is 56530924.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42903559) and next prime (42903571).

It can be written as a sum of positive squares in 2 ways, for example, as 30980356 + 11923209 = 5566^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 42903565 - 2²¹ = 40806413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42903565.

It is a congruent number.

It is an unprimeable number.

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, 4290352 + ... + 4290361.

It is an arithmetic number, because the mean of its divisors is an integer number (12871071).

Almost surely, 2^42903565 is an apocalyptic number.

It is an amenable number.

42903565 is a deficient number, since it is larger than the sum of its proper divisors (8580719).

42903565 is an equidigital number, since it uses as much as digits as its factorization.

42903565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580718.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 42903565 is about 6550.0812972054. The cubic root of 42903565 is about 350.0777106358.

The spelling of 42903565 in words is "forty-two million, nine hundred three thousand, five hundred sixty-five".