1222454421 has 12 divisors (see below), whose sum is σ = 1770382848. Its totient is φ = 812839464.

The previous prime is 1222454417. The next prime is 1222454449. The reversal of 1222454421 is 1244542221.

It is a happy number.

1222454421 is a `hidden beast` number, since 12 + 224 + 5 + 4 + 421 = 666.

It is not a de Polignac number, because 1222454421 - 2² = 1222454417 is a prime.

It is a super-2 number, since 2×1222454421² = 2988789622844890482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222454491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173875 + ... + 180768.

It is an arithmetic number, because the mean of its divisors is an integer number (147531904).

Almost surely, 2^1222454421 is an apocalyptic number.

It is an amenable number.

1222454421 is a deficient number, since it is larger than the sum of its proper divisors (547928427).

1222454421 is a wasteful number, since it uses less digits than its factorization.

1222454421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355032 (or 355029 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 1222454421 is about 34963.6156740117. The cubic root of 1222454421 is about 1069.2458134887.

Adding to 1222454421 its reverse (1244542221), we get a palindrome (2466996642).

The spelling of 1222454421 in words is "one billion, two hundred twenty-two million, four hundred fifty-four thousand, four hundred twenty-one".