4081839 has 4 divisors (see below), whose sum is σ = 5442456. Its totient is φ = 2721224.

The previous prime is 4081813. The next prime is 4081849. The reversal of 4081839 is 9381804.

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 4081839 - 2⁷ = 4081711 is a prime.

It is a super-2 number, since 2×4081839² = 33322819243842, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081849) 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, 680304 + ... + 680309.

It is an arithmetic number, because the mean of its divisors is an integer number (1360614).

Almost surely, 2^4081839 is an apocalyptic number.

4081839 is a deficient number, since it is larger than the sum of its proper divisors (1360617).

4081839 is a wasteful number, since it uses less digits than its factorization.

4081839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360616.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 4081839 is about 2020.3561567209. The cubic root of 4081839 is about 159.8153990767.

The spelling of 4081839 in words is "four million, eighty-one thousand, eight hundred thirty-nine".