3819521 has 2 divisors, whose sum is σ = 3819522. Its totient is φ = 3819520.

The previous prime is 3819511. The next prime is 3819523. The reversal of 3819521 is 1259183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2768896 + 1050625 = 1664^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 3819521 - 2¹⁸ = 3557377 is a prime.

Together with 3819523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3819523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1909760 + 1909761.

It is an arithmetic number, because the mean of its divisors is an integer number (1909761).

It is a Proth number, since it is equal to 1865 ⋅ 2¹¹ + 1 and 1865 < 2¹¹.

Almost surely, 2^3819521 is an apocalyptic number.

It is an amenable number.

3819521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3819521 is an equidigital number, since it uses as much as digits as its factorization.

3819521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 3819521 is about 1954.3594858674. The cubic root of 3819521 is about 156.3158323125.

The spelling of 3819521 in words is "three million, eight hundred nineteen thousand, five hundred twenty-one".