4048021 has 4 divisors (see below), whose sum is σ = 4114444. Its totient is φ = 3981600.

The previous prime is 4048013. The next prime is 4048043. The reversal of 4048021 is 1208404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 3845521 = 450^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4048021 - 2³ = 4048013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4048021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4048001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33120 + ... + 33241.

It is an arithmetic number, because the mean of its divisors is an integer number (1028611).

Almost surely, 2^4048021 is an apocalyptic number.

It is an amenable number.

4048021 is a deficient number, since it is larger than the sum of its proper divisors (66423).

4048021 is an equidigital number, since it uses as much as digits as its factorization.

4048021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66422.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4048021 is about 2011.9694331674. The cubic root of 4048021 is about 159.3728181683.

The spelling of 4048021 in words is "four million, forty-eight thousand, twenty-one".