42503785 has 4 divisors (see below), whose sum is σ = 51004548. Its totient is φ = 34003024.

The previous prime is 42503771. The next prime is 42503789. The reversal of 42503785 is 58730524.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 34070569 = 2904^2 + 5837^2 .

It is a cyclic number.

It is not a de Polignac number, because 42503785 - 2⁵ = 42503753 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 42503785.

It is not an unprimeable number, because it can be changed into a prime (42503789) 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, 4250374 + ... + 4250383.

It is an arithmetic number, because the mean of its divisors is an integer number (12751137).

Almost surely, 2^42503785 is an apocalyptic number.

It is an amenable number.

42503785 is a deficient number, since it is larger than the sum of its proper divisors (8500763).

42503785 is an equidigital number, since it uses as much as digits as its factorization.

42503785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500762.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 42503785 is about 6519.4926949879. The cubic root of 42503785 is about 348.9869618531.

The spelling of 42503785 in words is "forty-two million, five hundred three thousand, seven hundred eighty-five".