4185845 has 8 divisors (see below), whose sum is σ = 5045976. Its totient is φ = 3333376.

The previous prime is 4185829. The next prime is 4185851. The reversal of 4185845 is 5485814.

It can be written as a sum of positive squares in 4 ways, for example, as 20164 + 4165681 = 142^2 + 2041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4185845 - 2⁴ = 4185829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632 + ... + 2961.

It is an arithmetic number, because the mean of its divisors is an integer number (630747).

Almost surely, 2^4185845 is an apocalyptic number.

It is an amenable number.

4185845 is a deficient number, since it is larger than the sum of its proper divisors (860131).

4185845 is a wasteful number, since it uses less digits than its factorization.

4185845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831.

The product of its digits is 25600, while the sum is 35.

The square root of 4185845 is about 2045.9337721442. The cubic root of 4185845 is about 161.1614059737.

The spelling of 4185845 in words is "four million, one hundred eighty-five thousand, eight hundred forty-five".