3887021 has 2 divisors, whose sum is σ = 3887022. Its totient is φ = 3887020.

The previous prime is 3887017. The next prime is 3887047. The reversal of 3887021 is 1207883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3189796 + 697225 = 1786^2 + 835^2 .

It is an emirp because it is prime and its reverse (1207883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3887021 - 2² = 3887017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3887011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1943510 + 1943511.

It is an arithmetic number, because the mean of its divisors is an integer number (1943511).

Almost surely, 2^3887021 is an apocalyptic number.

It is an amenable number.

3887021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3887021 is an equidigital number, since it uses as much as digits as its factorization.

3887021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 3887021 is about 1971.5529412116. The cubic root of 3887021 is about 157.2312844694.

The spelling of 3887021 in words is "three million, eight hundred eighty-seven thousand, twenty-one".