4015881 has 12 divisors (see below), whose sum is σ = 5844852. Its totient is φ = 2656896.

The previous prime is 4015877. The next prime is 4015883. The reversal of 4015881 is 1885104.

4015881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2944656 + 1071225 = 1716^2 + 1035^2 .

It is not a de Polignac number, because 4015881 - 2² = 4015877 is a prime.

It is a super-2 number, since 2×4015881² = 32254600412322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4015883) 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 11 ways as a sum of consecutive naturals, for example, 396 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (487071).

Almost surely, 2^4015881 is an apocalyptic number.

It is an amenable number.

4015881 is a deficient number, since it is larger than the sum of its proper divisors (1828971).

4015881 is a wasteful number, since it uses less digits than its factorization.

4015881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3397 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 4015881 is about 2003.9663170822. The cubic root of 4015881 is about 158.9499070869.

The spelling of 4015881 in words is "four million, fifteen thousand, eight hundred eighty-one".