3221472 has 48 divisors (see below), whose sum is σ = 8830080. Its totient is φ = 1026432.

The previous prime is 3221453. The next prime is 3221473. The reversal of 3221472 is 2741223.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221473) 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, 1479 + ... + 2937.

It is an arithmetic number, because the mean of its divisors is an integer number (183960).

Almost surely, 2^3221472 is an apocalyptic number.

3221472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4415040).

3221472 is an abundant number, since it is smaller than the sum of its proper divisors (5608608).

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

3221472 is a wasteful number, since it uses less digits than its factorization.

3221472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1487 counting only the distinct ones).

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

The square root of 3221472 is about 1794.8459543927. The cubic root of 3221472 is about 147.6901234987.

Adding to 3221472 its reverse (2741223), we get a palindrome (5962695).

Subtracting from 3221472 its reverse (2741223), we obtain a square (480249 = 693²).

The spelling of 3221472 in words is "three million, two hundred twenty-one thousand, four hundred seventy-two".