4048921 has 2 divisors, whose sum is σ = 4048922. Its totient is φ = 4048920.

The previous prime is 4048901. The next prime is 4048927. The reversal of 4048921 is 1298404.

4048921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2975625 + 1073296 = 1725^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 4048921 - 2¹⁵ = 4016153 is a prime.

It is a super-2 number, since 2×4048921² = 32787522528482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4048921.

It is not a weakly prime, because it can be changed into another prime (4048927) 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 as a sum of consecutive naturals, namely, 2024460 + 2024461.

It is an arithmetic number, because the mean of its divisors is an integer number (2024461).

Almost surely, 2^4048921 is an apocalyptic number.

It is an amenable number.

4048921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4048921 is an equidigital number, since it uses as much as digits as its factorization.

4048921 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4048921 is about 2012.1930821867. The cubic root of 4048921 is about 159.3846284584.

The spelling of 4048921 in words is "four million, forty-eight thousand, nine hundred twenty-one".