3936021 has 16 divisors (see below), whose sum is σ = 5568000. Its totient is φ = 2466288.

The previous prime is 3936019. The next prime is 3936043. The reversal of 3936021 is 1206393.

3936021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3936021 - 2¹ = 3936019 is a prime.

It is a super-2 number, since 2×3936021² = 30984522624882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3935982 and 3936000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3936001) 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, 11170 + ... + 11516.

It is an arithmetic number, because the mean of its divisors is an integer number (348000).

Almost surely, 2^3936021 is an apocalyptic number.

It is an amenable number.

3936021 is a deficient number, since it is larger than the sum of its proper divisors (1631979).

3936021 is a wasteful number, since it uses less digits than its factorization.

3936021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 3936021 is about 1983.9407753257. The cubic root of 3936021 is about 157.8892162573.

The spelling of 3936021 in words is "three million, nine hundred thirty-six thousand, twenty-one".