4036021 has 16 divisors (see below), whose sum is σ = 4727808. Its totient is φ = 3404800.

The previous prime is 4036009. The next prime is 4036033. The reversal of 4036021 is 1206304.

It is an interprime number because it is at equal distance from previous prime (4036009) and next prime (4036033).

It is a cyclic number.

It is not a de Polignac number, because 4036021 - 2⁵ = 4035989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4035986 and 4036004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4036001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21036 + ... + 21226.

It is an arithmetic number, because the mean of its divisors is an integer number (295488).

Almost surely, 2^4036021 is an apocalyptic number.

It is an amenable number.

4036021 is a deficient number, since it is larger than the sum of its proper divisors (691787).

4036021 is a wasteful number, since it uses less digits than its factorization.

4036021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 4036021 is about 2008.9850671421. The cubic root of 4036021 is about 159.2151800925.

The spelling of 4036021 in words is "four million, thirty-six thousand, twenty-one".