4081987 has 16 divisors (see below), whose sum is σ = 5189632. Its totient is φ = 3123360.

The previous prime is 4081969. The next prime is 4081991. The reversal of 4081987 is 7891804.

4081987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4081987 - 2¹⁹ = 3557699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4081387) 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 15 ways as a sum of consecutive naturals, for example, 2098 + ... + 3544.

It is an arithmetic number, because the mean of its divisors is an integer number (324352).

Almost surely, 2^4081987 is an apocalyptic number.

4081987 is a deficient number, since it is larger than the sum of its proper divisors (1107645).

4081987 is a wasteful number, since it uses less digits than its factorization.

4081987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 4081987 is about 2020.3927835943. The cubic root of 4081987 is about 159.8173305912.

The spelling of 4081987 in words is "four million, eighty-one thousand, nine hundred eighty-seven".