4065139 has 4 divisors (see below), whose sum is σ = 4377856. Its totient is φ = 3752424.

The previous prime is 4065137. The next prime is 4065157. The reversal of 4065139 is 9315604.

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

It is not a de Polignac number, because 4065139 - 2¹ = 4065137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4065137) 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, 156339 + ... + 156364.

It is an arithmetic number, because the mean of its divisors is an integer number (1094464).

Almost surely, 2^4065139 is an apocalyptic number.

4065139 is a deficient number, since it is larger than the sum of its proper divisors (312717).

4065139 is a wasteful number, since it uses less digits than its factorization.

4065139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312716.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 4065139 is about 2016.2189861223. The cubic root of 4065139 is about 159.5971506161.

The spelling of 4065139 in words is "four million, sixty-five thousand, one hundred thirty-nine".