42747085 has 4 divisors (see below), whose sum is σ = 51296508. Its totient is φ = 34197664.

The previous prime is 42747083. The next prime is 42747091. The reversal of 42747085 is 58074724.

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 26409321 + 16337764 = 5139^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 42747085 - 2¹ = 42747083 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 (42747083) 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, 4274704 + ... + 4274713.

It is an arithmetic number, because the mean of its divisors is an integer number (12824127).

Almost surely, 2^42747085 is an apocalyptic number.

It is an amenable number.

42747085 is a deficient number, since it is larger than the sum of its proper divisors (8549423).

42747085 is an equidigital number, since it uses as much as digits as its factorization.

42747085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8549422.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 42747085 is about 6538.1254958895. The cubic root of 42747085 is about 349.6515852512.

The spelling of 42747085 in words is "forty-two million, seven hundred forty-seven thousand, eighty-five".