7220449 has 4 divisors (see below), whose sum is σ = 7469460. Its totient is φ = 6971440.

The previous prime is 7220443. The next prime is 7220453. The reversal of 7220449 is 9440227.

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 1782225 + 5438224 = 1335^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 7220449 - 2³ = 7220441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220441) 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, 124462 + ... + 124519.

It is an arithmetic number, because the mean of its divisors is an integer number (1867365).

Almost surely, 2^7220449 is an apocalyptic number.

It is an amenable number.

7220449 is a deficient number, since it is larger than the sum of its proper divisors (249011).

7220449 is a wasteful number, since it uses less digits than its factorization.

7220449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249010.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7220449 is about 2687.0893174586. The cubic root of 7220449 is about 193.2805123899.

The spelling of 7220449 in words is "seven million, two hundred twenty thousand, four hundred forty-nine".