3221725 has 24 divisors (see below), whose sum is σ = 4499712. Its totient is φ = 2270400.

The previous prime is 3221719. The next prime is 3221731. The reversal of 3221725 is 5271223.

3221725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3221719) and next prime (3221731).

It is not a de Polignac number, because 3221725 - 2³ = 3221717 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221696 and 3221705.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7260 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (187488).

Almost surely, 2^3221725 is an apocalyptic number.

It is an amenable number.

3221725 is a deficient number, since it is larger than the sum of its proper divisors (1277987).

3221725 is a wasteful number, since it uses less digits than its factorization.

3221725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 472 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 3221725 is about 1794.9164325951. The cubic root of 3221725 is about 147.6939897047.

Adding to 3221725 its reverse (5271223), we get a palindrome (8492948).

The spelling of 3221725 in words is "three million, two hundred twenty-one thousand, seven hundred twenty-five".