4005289 has 4 divisors (see below), whose sum is σ = 4179456. Its totient is φ = 3831124.

The previous prime is 4005271. The next prime is 4005301. The reversal of 4005289 is 9825004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4005289 - 2¹⁹ = 3481001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4005229) 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, 87049 + ... + 87094.

It is an arithmetic number, because the mean of its divisors is an integer number (1044864).

Almost surely, 2^4005289 is an apocalyptic number.

It is an amenable number.

4005289 is a deficient number, since it is larger than the sum of its proper divisors (174167).

4005289 is a wasteful number, since it uses less digits than its factorization.

4005289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174166.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 4005289 is about 2001.3218132025. The cubic root of 4005289 is about 158.8100390839.

The spelling of 4005289 in words is "four million, five thousand, two hundred eighty-nine".