4020071 has 4 divisors (see below), whose sum is σ = 4385544. Its totient is φ = 3654600.

The previous prime is 4020031. The next prime is 4020119. The reversal of 4020071 is 1700204.

It is a happy number.

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 4020071 - 2¹⁰ = 4019047 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 (4020011) 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, 182720 + ... + 182741.

It is an arithmetic number, because the mean of its divisors is an integer number (1096386).

Almost surely, 2^4020071 is an apocalyptic number.

4020071 is a deficient number, since it is larger than the sum of its proper divisors (365473).

4020071 is a wasteful number, since it uses less digits than its factorization.

4020071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365472.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 4020071 is about 2005.0114712889. The cubic root of 4020071 is about 159.0051684039.

Adding to 4020071 its reverse (1700204), we get a palindrome (5720275).

The spelling of 4020071 in words is "four million, twenty thousand, seventy-one".