722422 has 4 divisors (see below), whose sum is σ = 1083636. Its totient is φ = 361210.

The previous prime is 722417. The next prime is 722431. The reversal of 722422 is 224227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224227 = 23 ⋅9749.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 722422.

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 as a sum of consecutive naturals, namely, 180604 + ... + 180607.

It is an arithmetic number, because the mean of its divisors is an integer number (270909).

2⁷²²⁴²² is an apocalyptic number.

722422 is a deficient number, since it is larger than the sum of its proper divisors (361214).

722422 is a wasteful number, since it uses less digits than its factorization.

722422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361213.

The product of its digits is 448, while the sum is 19.

The square root of 722422 is about 849.9541164086. The cubic root of 722422 is about 89.7284821023.

Adding to 722422 its reverse (224227), we get a palindrome (946649).

The spelling of 722422 in words is "seven hundred twenty-two thousand, four hundred twenty-two", and thus it is an iban number.