7221612 has 12 divisors (see below), whose sum is σ = 16850456. Its totient is φ = 2407200.

The previous prime is 7221611. The next prime is 7221619. The reversal of 7221612 is 2161227.

7221612 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300889 + ... + 300912.

Almost surely, 2^7221612 is an apocalyptic number.

It is an amenable number.

7221612 is an abundant number, since it is smaller than the sum of its proper divisors (9628844).

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

7221612 is a wasteful number, since it uses less digits than its factorization.

7221612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601808 (or 601806 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 7221612 is about 2687.3057139075. The cubic root of 7221612 is about 193.2908890839.

Adding to 7221612 its reverse (2161227), we get a palindrome (9382839).

The spelling of 7221612 in words is "seven million, two hundred twenty-one thousand, six hundred twelve".