3839221 has 2 divisors, whose sum is σ = 3839222. Its totient is φ = 3839220.

The previous prime is 3839203. The next prime is 3839233. The reversal of 3839221 is 1229383.

3839221 = 1385² + 1386².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 1918225 = 1386^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 3839221 - 2¹⁹ = 3314933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3839221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3839201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1919610 + 1919611.

It is an arithmetic number, because the mean of its divisors is an integer number (1919611).

Almost surely, 2^3839221 is an apocalyptic number.

3839221 is the 1386-th centered square number.

It is an amenable number.

3839221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3839221 is an equidigital number, since it uses as much as digits as its factorization.

3839221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 3839221 is about 1959.3930182585. The cubic root of 3839221 is about 156.5841157574.

It can be divided in two parts, 383 and 9221, that added together give a square (9604 = 98²).

The spelling of 3839221 in words is "three million, eight hundred thirty-nine thousand, two hundred twenty-one".