3221406 has 24 divisors (see below), whose sum is σ = 7023744. Its totient is φ = 1067040.

The previous prime is 3221401. The next prime is 3221419. The reversal of 3221406 is 6041223.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2970 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (292656).

Almost surely, 2^3221406 is an apocalyptic number.

3221406 is an abundant number, since it is smaller than the sum of its proper divisors (3802338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221406 is a wasteful number, since it uses less digits than its factorization.

3221406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3221406 is about 1794.8275683196. The cubic root of 3221406 is about 147.6891148899.

Adding to 3221406 its reverse (6041223), we get a palindrome (9262629).

It can be divided in two parts, 322 and 1406, that added together give a cube (1728 = 12³).

The spelling of 3221406 in words is "three million, two hundred twenty-one thousand, four hundred six".