7259221 has 4 divisors (see below), whose sum is σ = 7686252. Its totient is φ = 6832192.

The previous prime is 7259167. The next prime is 7259267. The reversal of 7259221 is 1229527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4778596 + 2480625 = 2186^2 + 1575^2 .

It is a cyclic number.

It is not a de Polignac number, because 7259221 - 2⁹ = 7258709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7259221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7259621) 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, 213490 + ... + 213523.

It is an arithmetic number, because the mean of its divisors is an integer number (1921563).

Almost surely, 2^7259221 is an apocalyptic number.

It is an amenable number.

7259221 is a deficient number, since it is larger than the sum of its proper divisors (427031).

7259221 is a wasteful number, since it uses less digits than its factorization.

7259221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427030.

The product of its digits is 2520, while the sum is 28.

The square root of 7259221 is about 2694.2941561752. The cubic root of 7259221 is about 193.6258509552.

The spelling of 7259221 in words is "seven million, two hundred fifty-nine thousand, two hundred twenty-one".