4075021 has 2 divisors, whose sum is σ = 4075022. Its totient is φ = 4075020.

The previous prime is 4075003. The next prime is 4075039. The reversal of 4075021 is 1205704.

It is a balanced prime because it is at equal distance from previous prime (4075003) and next prime (4075039).

It can be written as a sum of positive squares in only one way, i.e., 3960100 + 114921 = 1990^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 4075021 - 2¹⁵ = 4042253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4075021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4075091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2037510 + 2037511.

It is an arithmetic number, because the mean of its divisors is an integer number (2037511).

Almost surely, 2^4075021 is an apocalyptic number.

It is an amenable number.

4075021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4075021 is an equidigital number, since it uses as much as digits as its factorization.

4075021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 4075021 is about 2018.6681252747. The cubic root of 4075021 is about 159.7263682396.

The spelling of 4075021 in words is "four million, seventy-five thousand, twenty-one".