4578891 has 4 divisors (see below), whose sum is σ = 6105192. Its totient is φ = 3052592.

The previous prime is 4578883. The next prime is 4578901. The reversal of 4578891 is 1988754.

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 4578891 - 2³ = 4578883 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4578811) 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, 763146 + ... + 763151.

It is an arithmetic number, because the mean of its divisors is an integer number (1526298).

Almost surely, 2^4578891 is an apocalyptic number.

4578891 is a deficient number, since it is larger than the sum of its proper divisors (1526301).

4578891 is a wasteful number, since it uses less digits than its factorization.

4578891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526300.

The product of its digits is 80640, while the sum is 42.

The square root of 4578891 is about 2139.8343393824. The cubic root of 4578891 is about 166.0555651795.

The spelling of 4578891 in words is "four million, five hundred seventy-eight thousand, eight hundred ninety-one".