4056891 has 8 divisors (see below), whose sum is σ = 5419344. Its totient is φ = 2699520.

The previous prime is 4056883. The next prime is 4056893. The reversal of 4056891 is 1986504.

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

It is not a de Polignac number, because 4056891 - 2³ = 4056883 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4² + 0 + 5⁹ + 6² + 8⁷ + 9⁴ + 1 .

It is not an unprimeable number, because it can be changed into a prime (4056893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (677418).

Almost surely, 2^4056891 is an apocalyptic number.

4056891 is a deficient number, since it is larger than the sum of its proper divisors (1362453).

4056891 is a wasteful number, since it uses less digits than its factorization.

4056891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 4056891 is about 2014.1725348142. The cubic root of 4056891 is about 159.4891388457.

The spelling of 4056891 in words is "four million, fifty-six thousand, eight hundred ninety-one".