4085845 has 4 divisors (see below), whose sum is σ = 4903020. Its totient is φ = 3268672.

The previous prime is 4085827. The next prime is 4085849. The reversal of 4085845 is 5485804.

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 956484 + 3129361 = 978^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 4085845 - 2¹³ = 4077653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4085845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4085849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408580 + ... + 408589.

It is an arithmetic number, because the mean of its divisors is an integer number (1225755).

Almost surely, 2^4085845 is an apocalyptic number.

It is an amenable number.

4085845 is a deficient number, since it is larger than the sum of its proper divisors (817175).

4085845 is an equidigital number, since it uses as much as digits as its factorization.

4085845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817174.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 4085845 is about 2021.3473229507. The cubic root of 4085845 is about 159.8676640126.

The spelling of 4085845 in words is "four million, eighty-five thousand, eight hundred forty-five".