4056865 has 8 divisors (see below), whose sum is σ = 5000040. Its totient is φ = 3157632.

The previous prime is 4056859. The next prime is 4056883. The reversal of 4056865 is 5686504.

4056865 = T₁₁₀ + T₁₁₁ + ... + T₂₉₄.

It can be written as a sum of positive squares in 4 ways, for example, as 2521744 + 1535121 = 1588^2 + 1239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4056865 - 2⁷ = 4056737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4056865.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10780 + ... + 11149.

It is an arithmetic number, because the mean of its divisors is an integer number (625005).

Almost surely, 2^4056865 is an apocalyptic number.

It is an amenable number.

4056865 is a deficient number, since it is larger than the sum of its proper divisors (943175).

4056865 is a wasteful number, since it uses less digits than its factorization.

4056865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21971.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 4056865 is about 2014.1660805405. The cubic root of 4056865 is about 159.4887981310.

The spelling of 4056865 in words is "four million, fifty-six thousand, eight hundred sixty-five".