4005671 has 4 divisors (see below), whose sum is σ = 4026000. Its totient is φ = 3985344.

The previous prime is 4005653. The next prime is 4005691. The reversal of 4005671 is 1765004.

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 4005671 - 2¹⁴ = 3989287 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 (4005691) 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, 9866 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (1006500).

Almost surely, 2^4005671 is an apocalyptic number.

4005671 is a deficient number, since it is larger than the sum of its proper divisors (20329).

4005671 is a wasteful number, since it uses less digits than its factorization.

4005671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20328.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 4005671 is about 2001.4172478521. The cubic root of 4005671 is about 158.8150877005.

The spelling of 4005671 in words is "four million, five thousand, six hundred seventy-one".