4085145 has 24 divisors (see below), whose sum is σ = 7390656. Its totient is φ = 2083488.

The previous prime is 4085119. The next prime is 4085167. The reversal of 4085145 is 5415804.

It is not a de Polignac number, because 4085145 - 2⁵ = 4085113 is a prime.

4085145 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 939 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (307944).

Almost surely, 2^4085145 is an apocalyptic number.

4085145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4085145 is a deficient number, since it is larger than the sum of its proper divisors (3305511).

4085145 is a wasteful number, since it uses less digits than its factorization.

4085145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981 (or 3978 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 4085145 is about 2021.1741636979. The cubic root of 4085145 is about 159.8585338118.

The spelling of 4085145 in words is "four million, eighty-five thousand, one hundred forty-five".