3886021 has 4 divisors (see below), whose sum is σ = 3980844. Its totient is φ = 3791200.

The previous prime is 3885997. The next prime is 3886027. The reversal of 3886021 is 1206883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1206883 = 79 ⋅15277.

It can be written as a sum of positive squares in 2 ways, for example, as 504100 + 3381921 = 710^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 3886021 - 2⁵ = 3885989 is a prime.

It is an Ulam number.

It is a Duffinian number.

3886021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3886027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47350 + ... + 47431.

It is an arithmetic number, because the mean of its divisors is an integer number (995211).

Almost surely, 2^3886021 is an apocalyptic number.

It is an amenable number.

3886021 is a deficient number, since it is larger than the sum of its proper divisors (94823).

3886021 is an equidigital number, since it uses as much as digits as its factorization.

3886021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94822.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 3886021 is about 1971.2993177090. The cubic root of 3886021 is about 157.2177998694.

The spelling of 3886021 in words is "three million, eight hundred eighty-six thousand, twenty-one".