1224433621 has 8 divisors (see below), whose sum is σ = 1267452000. Its totient is φ = 1181468400.

The previous prime is 1224433607. The next prime is 1224433631. The reversal of 1224433621 is 1263344221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224433621 - 2⁷ = 1224433493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1224433621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224433601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36846 + ... + 61696.

It is an arithmetic number, because the mean of its divisors is an integer number (158431500).

Almost surely, 2^1224433621 is an apocalyptic number.

It is an amenable number.

1224433621 is a deficient number, since it is larger than the sum of its proper divisors (43018379).

1224433621 is a wasteful number, since it uses less digits than its factorization.

1224433621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26579.

The product of its digits is 6912, while the sum is 28.

The square root of 1224433621 is about 34991.9079359786. The cubic root of 1224433621 is about 1069.8225521676.

Adding to 1224433621 its reverse (1263344221), we get a palindrome (2487777842).

The spelling of 1224433621 in words is "one billion, two hundred twenty-four million, four hundred thirty-three thousand, six hundred twenty-one".