4057891 has 4 divisors (see below), whose sum is σ = 4097392. Its totient is φ = 4018392.

The previous prime is 4057873. The next prime is 4057897. The reversal of 4057891 is 1987504.

It is a happy number.

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 4057891 - 2⁹ = 4057379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4057897) 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, 19596 + ... + 19801.

It is an arithmetic number, because the mean of its divisors is an integer number (1024348).

Almost surely, 2^4057891 is an apocalyptic number.

4057891 is a deficient number, since it is larger than the sum of its proper divisors (39501).

4057891 is a wasteful number, since it uses less digits than its factorization.

4057891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39500.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 4057891 is about 2014.4207604172. The cubic root of 4057891 is about 159.5022421503.

The spelling of 4057891 in words is "four million, fifty-seven thousand, eight hundred ninety-one".