7221285 has 32 divisors (see below), whose sum is σ = 12960000. Its totient is φ = 3814848.

The previous prime is 7221283. The next prime is 7221293. The reversal of 7221285 is 5821227.

7221285 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7221285 - 2¹ = 7221283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19936 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (405000).

Almost surely, 2^7221285 is an apocalyptic number.

It is an amenable number.

7221285 is a deficient number, since it is larger than the sum of its proper divisors (5738715).

7221285 is a wasteful number, since it uses less digits than its factorization.

7221285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 516 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 7221285 is about 2687.2448716111. The cubic root of 7221285 is about 193.2879715878.

The spelling of 7221285 in words is "seven million, two hundred twenty-one thousand, two hundred eighty-five".