3800521 has 2 divisors, whose sum is σ = 3800522. Its totient is φ = 3800520.

The previous prime is 3800501. The next prime is 3800549. The reversal of 3800521 is 1250083.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2822400 + 978121 = 1680^2 + 989^2 .

It is an emirp because it is prime and its reverse (1250083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3800521 - 2⁷ = 3800393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3800501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1900260 + 1900261.

It is an arithmetic number, because the mean of its divisors is an integer number (1900261).

Almost surely, 2^3800521 is an apocalyptic number.

It is an amenable number.

3800521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3800521 is an equidigital number, since it uses as much as digits as its factorization.

3800521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3800521 is about 1949.4924980620. The cubic root of 3800521 is about 156.0562064614.

The spelling of 3800521 in words is "three million, eight hundred thousand, five hundred twenty-one".