4005123871 has 8 divisors (see below), whose sum is σ = 4587714560. Its totient is φ = 3425140728.

The previous prime is 4005123869. The next prime is 4005123917. The reversal of 4005123871 is 1783215004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4005123871 - 2¹ = 4005123869 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 (4005123821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648591 + ... + 654736.

It is an arithmetic number, because the mean of its divisors is an integer number (573464320).

Almost surely, 2^4005123871 is an apocalyptic number.

4005123871 is a deficient number, since it is larger than the sum of its proper divisors (582590689).

4005123871 is a wasteful number, since it uses less digits than its factorization.

4005123871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303773.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 4005123871 is about 63286.0479963791. The cubic root of 4005123871 is about 1588.0785659439.

Adding to 4005123871 its reverse (1783215004), we get a palindrome (5788338875).

The spelling of 4005123871 in words is "four billion, five million, one hundred twenty-three thousand, eight hundred seventy-one".