7221472 has 12 divisors (see below), whose sum is σ = 14217336. Its totient is φ = 3610720.

The previous prime is 7221457. The next prime is 7221499. The reversal of 7221472 is 2741227.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112804 + ... + 112867.

It is an arithmetic number, because the mean of its divisors is an integer number (1184778).

Almost surely, 2^7221472 is an apocalyptic number.

It is an amenable number.

7221472 is a deficient number, since it is larger than the sum of its proper divisors (6995864).

7221472 is a wasteful number, since it uses less digits than its factorization.

7221472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225681 (or 225673 counting only the distinct ones).

The product of its digits is 1568, while the sum is 25.

The square root of 7221472 is about 2687.2796653865. The cubic root of 7221472 is about 193.2896400138.

Adding to 7221472 its reverse (2741227), we get a palindrome (9962699).

The spelling of 7221472 in words is "seven million, two hundred twenty-one thousand, four hundred seventy-two".