3805139 has 4 divisors (see below), whose sum is σ = 4097856. Its totient is φ = 3512424.

The previous prime is 3805133. The next prime is 3805159. The reversal of 3805139 is 9315083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3805139 - 2¹² = 3801043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3805133) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 146339 + ... + 146364.

It is an arithmetic number, because the mean of its divisors is an integer number (1024464).

Almost surely, 2^3805139 is an apocalyptic number.

3805139 is a deficient number, since it is larger than the sum of its proper divisors (292717).

3805139 is a wasteful number, since it uses less digits than its factorization.

3805139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292716.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 3805139 is about 1950.6765493028. The cubic root of 3805139 is about 156.1193886641.

The spelling of 3805139 in words is "three million, eight hundred five thousand, one hundred thirty-nine".