3221724 has 24 divisors (see below), whose sum is σ = 8201088. Its totient is φ = 976240.

The previous prime is 3221719. The next prime is 3221731. The reversal of 3221724 is 4271223.

It is a self number, because there is not a number n which added to its sum of digits gives 3221724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12072 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (341712).

Almost surely, 2^3221724 is an apocalyptic number.

It is an amenable number.

3221724 is an abundant number, since it is smaller than the sum of its proper divisors (4979364).

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

3221724 is a wasteful number, since it uses less digits than its factorization.

3221724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24425 (or 24423 counting only the distinct ones).

The product of its digits is 672, while the sum is 21.

The square root of 3221724 is about 1794.9161540306. The cubic root of 3221724 is about 147.6939744236.

Adding to 3221724 its reverse (4271223), we get a palindrome (7492947).

The spelling of 3221724 in words is "three million, two hundred twenty-one thousand, seven hundred twenty-four".