7221450 has 48 divisors (see below), whose sum is σ = 18498816. Its totient is φ = 1862400.

The previous prime is 7221449. The next prime is 7221457. The reversal of 7221450 is 541227.

It is not an unprimeable number, because it can be changed into a prime (7221457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3874 + ... + 5426.

It is an arithmetic number, because the mean of its divisors is an integer number (385392).

Almost surely, 2^7221450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9249408).

7221450 is an abundant number, since it is smaller than the sum of its proper divisors (11277366).

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

7221450 is a wasteful number, since it uses less digits than its factorization.

7221450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7221450 is about 2687.2755720246. The cubic root of 7221450 is about 193.2894437298.

Adding to 7221450 its reverse (541227), we get a palindrome (7762677).

The spelling of 7221450 in words is "seven million, two hundred twenty-one thousand, four hundred fifty".