3575821 has 2 divisors, whose sum is σ = 3575822. Its totient is φ = 3575820.

The previous prime is 3575783. The next prime is 3575839. The reversal of 3575821 is 1285753.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 3721 = 1890^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 3575821 - 2¹⁵ = 3543053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3575861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1787910 + 1787911.

It is an arithmetic number, because the mean of its divisors is an integer number (1787911).

Almost surely, 2^3575821 is an apocalyptic number.

It is an amenable number.

3575821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3575821 is an equidigital number, since it uses as much as digits as its factorization.

3575821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 3575821 is about 1890.9841353116. The cubic root of 3575821 is about 152.9179932751.

The spelling of 3575821 in words is "three million, five hundred seventy-five thousand, eight hundred twenty-one".