3221387 has 4 divisors (see below), whose sum is σ = 3469200. Its totient is φ = 2973576.

The previous prime is 3221371. The next prime is 3221401. The reversal of 3221387 is 7831223.

3221387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7831223 = 107 ⋅73189.

It is a cyclic number.

It is not a de Polignac number, because 3221387 - 2⁴ = 3221371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221327) 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 in 3 ways as a sum of consecutive naturals, for example, 123887 + ... + 123912.

It is an arithmetic number, because the mean of its divisors is an integer number (867300).

Almost surely, 2^3221387 is an apocalyptic number.

3221387 is a deficient number, since it is larger than the sum of its proper divisors (247813).

3221387 is a wasteful number, since it uses less digits than its factorization.

3221387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247812.

The product of its digits is 2016, while the sum is 26.

The square root of 3221387 is about 1794.8222753242. The cubic root of 3221387 is about 147.6888245303.

The spelling of 3221387 in words is "three million, two hundred twenty-one thousand, three hundred eighty-seven".