3221424 has 40 divisors (see below), whose sum is σ = 9247920. Its totient is φ = 1073664.

The previous prime is 3221423. The next prime is 3221429. The reversal of 3221424 is 4241223.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 3221397 and 3221406.

It is not an unprimeable number, because it can be changed into a prime (3221423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (231198).

Almost surely, 2^3221424 is an apocalyptic number.

It is an amenable number.

3221424 is an abundant number, since it is smaller than the sum of its proper divisors (6026496).

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

3221424 is a wasteful number, since it uses less digits than its factorization.

3221424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7474 (or 7462 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 3221424 is about 1794.8325827219. The cubic root of 3221424 is about 147.6893899664.

Adding to 3221424 its reverse (4241223), we get a palindrome (7462647).

The spelling of 3221424 in words is "three million, two hundred twenty-one thousand, four hundred twenty-four".