4056839 has 4 divisors (see below), whose sum is σ = 4196760. Its totient is φ = 3916920.

The previous prime is 4056817. The next prime is 4056847. The reversal of 4056839 is 9386504.

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 4056839 - 2⁸ = 4056583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4056799 and 4056808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4056859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69917 + ... + 69974.

It is an arithmetic number, because the mean of its divisors is an integer number (1049190).

Almost surely, 2^4056839 is an apocalyptic number.

4056839 is a deficient number, since it is larger than the sum of its proper divisors (139921).

4056839 is a wasteful number, since it uses less digits than its factorization.

4056839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139920.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 4056839 is about 2014.1596262461. The cubic root of 4056839 is about 159.4884574149.

The spelling of 4056839 in words is "four million, fifty-six thousand, eight hundred thirty-nine".