4085505 has 32 divisors (see below), whose sum is σ = 7413120. Its totient is φ = 2134080.

The previous prime is 4085489. The next prime is 4085507. The reversal of 4085505 is 5055804.

4085505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4085505 - 2⁴ = 4085489 is a prime.

It is a super-2 number, since 2×4085505² = 33382702210050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4085507) 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 31 ways as a sum of consecutive naturals, for example, 6870 + ... + 7440.

It is an arithmetic number, because the mean of its divisors is an integer number (231660).

Almost surely, 2^4085505 is an apocalyptic number.

4085505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4085505 is a deficient number, since it is larger than the sum of its proper divisors (3327615).

4085505 is a wasteful number, since it uses less digits than its factorization.

4085505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4085505 is about 2021.2632188807. The cubic root of 4085505 is about 159.8632294739.

Subtracting 4085505 from its reverse (5055804), we obtain a cube (970299 = 99³).

The spelling of 4085505 in words is "four million, eighty-five thousand, five hundred five".