7222405 has 4 divisors (see below), whose sum is σ = 8666892. Its totient is φ = 5777920.

The previous prime is 7222379. The next prime is 7222427. The reversal of 7222405 is 5042227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5042227 = 691 ⋅7297.

It can be written as a sum of positive squares in 2 ways, for example, as 1695204 + 5527201 = 1302^2 + 2351^2 .

It is not a de Polignac number, because 7222405 - 2⁵ = 7222373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 722236 + ... + 722245.

It is an arithmetic number, because the mean of its divisors is an integer number (2166723).

Almost surely, 2^7222405 is an apocalyptic number.

It is an amenable number.

7222405 is a deficient number, since it is larger than the sum of its proper divisors (1444487).

7222405 is a wasteful number, since it uses less digits than its factorization.

7222405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444486.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 7222405 is about 2687.4532554074. The cubic root of 7222405 is about 193.2979638693.

The spelling of 7222405 in words is "seven million, two hundred twenty-two thousand, four hundred five".