4028071 has 4 divisors (see below), whose sum is σ = 4167000. Its totient is φ = 3889144.

The previous prime is 4028069. The next prime is 4028077. The reversal of 4028071 is 1708204.

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 4028071 - 2¹ = 4028069 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028077) 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, 69421 + ... + 69478.

It is an arithmetic number, because the mean of its divisors is an integer number (1041750).

Almost surely, 2^4028071 is an apocalyptic number.

4028071 is a deficient number, since it is larger than the sum of its proper divisors (138929).

4028071 is a wasteful number, since it uses less digits than its factorization.

4028071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138928.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 4028071 is about 2007.0054808097. The cubic root of 4028071 is about 159.1105727185.

Subtracting from 4028071 its sum of digits (22), we obtain a square (4028049 = 2007²).

The spelling of 4028071 in words is "four million, twenty-eight thousand, seventy-one".