3221287 has 4 divisors (see below), whose sum is σ = 3282120. Its totient is φ = 3160456.

The previous prime is 3221269. The next prime is 3221297. The reversal of 3221287 is 7821223.

3221287 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: 7821223 = 47 ⋅166409.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3221287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221237) 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, 30337 + ... + 30442.

It is an arithmetic number, because the mean of its divisors is an integer number (820530).

Almost surely, 2^3221287 is an apocalyptic number.

3221287 is a deficient number, since it is larger than the sum of its proper divisors (60833).

3221287 is an equidigital number, since it uses as much as digits as its factorization.

3221287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60832.

The product of its digits is 1344, while the sum is 25.

The square root of 3221287 is about 1794.7944171966. The cubic root of 3221287 is about 147.6872963029.

It can be divided in two parts, 322 and 1287, that multiplied together give a palindrome (414414).

The spelling of 3221287 in words is "three million, two hundred twenty-one thousand, two hundred eighty-seven".