1222454320 has 20 divisors (see below), whose sum is σ = 2842206480. Its totient is φ = 488981696.

The previous prime is 1222454297. The next prime is 1222454323. The reversal of 1222454320 is 234542221.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1222454323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7640260 + ... + 7640419.

It is an arithmetic number, because the mean of its divisors is an integer number (142110324).

Almost surely, 2^1222454320 is an apocalyptic number.

1222454320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222454320 is an abundant number, since it is smaller than the sum of its proper divisors (1619752160).

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

1222454320 is a wasteful number, since it uses less digits than its factorization.

1222454320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15280692 (or 15280686 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1222454320 is about 34963.6142296531. The cubic root of 1222454320 is about 1069.2457840414.

Adding to 1222454320 its reverse (234542221), we get a palindrome (1456996541).

The spelling of 1222454320 in words is "one billion, two hundred twenty-two million, four hundred fifty-four thousand, three hundred twenty".