4002891 has 4 divisors (see below), whose sum is σ = 5337192. Its totient is φ = 2668592.

The previous prime is 4002877. The next prime is 4002893. The reversal of 4002891 is 1982004.

4002891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4002891 - 2¹⁰ = 4001867 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4002893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667146 + ... + 667151.

It is an arithmetic number, because the mean of its divisors is an integer number (1334298).

Almost surely, 2^4002891 is an apocalyptic number.

4002891 is a deficient number, since it is larger than the sum of its proper divisors (1334301).

4002891 is a wasteful number, since it uses less digits than its factorization.

4002891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334300.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4002891 is about 2000.7226194553. The cubic root of 4002891 is about 158.7783391241.

Adding to 4002891 its reverse (1982004), we get a palindrome (5984895).

The spelling of 4002891 in words is "four million, two thousand, eight hundred ninety-one".