4138805 has 12 divisors (see below), whose sum is σ = 5459916. Its totient is φ = 3009600.

The previous prime is 4138777. The next prime is 4138807. The reversal of 4138805 is 5088314.

It can be written as a sum of positive squares in 2 ways, for example, as 2337841 + 1800964 = 1529^2 + 1342^2 .

It is not a de Polignac number, because 4138805 - 2⁶ = 4138741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2816 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (454993).

Almost surely, 2^4138805 is an apocalyptic number.

It is an amenable number.

4138805 is a deficient number, since it is larger than the sum of its proper divisors (1321111).

4138805 is a wasteful number, since it uses less digits than its factorization.

4138805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6868 (or 6857 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 4138805 is about 2034.4053185145. The cubic root of 4138805 is about 160.5554264240. Note that the first 3 decimals are identical.

The spelling of 4138805 in words is "four million, one hundred thirty-eight thousand, eight hundred five".