4001959 has 4 divisors (see below), whose sum is σ = 4309816. Its totient is φ = 3694104.

The previous prime is 4001947. The next prime is 4001999. The reversal of 4001959 is 9591004.

4001959 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 4001959 - 2⁷ = 4001831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001939) 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, 153909 + ... + 153934.

It is an arithmetic number, because the mean of its divisors is an integer number (1077454).

Almost surely, 2^4001959 is an apocalyptic number.

4001959 is a deficient number, since it is larger than the sum of its proper divisors (307857).

4001959 is a wasteful number, since it uses less digits than its factorization.

4001959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307856.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 4001959 is about 2000.4896900509. The cubic root of 4001959 is about 158.7660152896.

The spelling of 4001959 in words is "four million, one thousand, nine hundred fifty-nine".