42847705 has 4 divisors (see below), whose sum is σ = 51417252. Its totient is φ = 34278160.

The previous prime is 42847669. The next prime is 42847711. The reversal of 42847705 is 50774824.

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 27331984 + 15515721 = 5228^2 + 3939^2 .

It is not a de Polignac number, because 42847705 - 2¹¹ = 42845657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284766 + ... + 4284775.

It is an arithmetic number, because the mean of its divisors is an integer number (12854313).

Almost surely, 2^42847705 is an apocalyptic number.

It is an amenable number.

42847705 is a deficient number, since it is larger than the sum of its proper divisors (8569547).

42847705 is an equidigital number, since it uses as much as digits as its factorization.

42847705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8569546.

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

The square root of 42847705 is about 6545.8158391449. The cubic root of 42847705 is about 349.9257121246.

The spelling of 42847705 in words is "forty-two million, eight hundred forty-seven thousand, seven hundred five".