3581321 has 2 divisors, whose sum is σ = 3581322. Its totient is φ = 3581320.

The previous prime is 3581293. The next prime is 3581363. The reversal of 3581321 is 1231853.

3581321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2449225 + 1132096 = 1565^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 3581321 - 2⁶ = 3581257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3581381) 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, 1790660 + 1790661.

It is an arithmetic number, because the mean of its divisors is an integer number (1790661).

Almost surely, 2^3581321 is an apocalyptic number.

It is an amenable number.

3581321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581321 is an equidigital number, since it uses as much as digits as its factorization.

3581321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 3581321 is about 1892.4378457429. The cubic root of 3581321 is about 152.9963545915.

The spelling of 3581321 in words is "three million, five hundred eighty-one thousand, three hundred twenty-one".