1224421619 has 4 divisors (see below), whose sum is σ = 1224492360. Its totient is φ = 1224350880.

The previous prime is 1224421589. The next prime is 1224421621. The reversal of 1224421619 is 9161244221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1224421619 - 2¹⁶ = 1224356083 is a prime.

It is a super-2 number, since 2×1224421619² = 2998416602149162322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224420619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9947 + ... + 50475.

It is an arithmetic number, because the mean of its divisors is an integer number (306123090).

Almost surely, 2^1224421619 is an apocalyptic number.

1224421619 is a deficient number, since it is larger than the sum of its proper divisors (70741).

1224421619 is an equidigital number, since it uses as much as digits as its factorization.

1224421619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70740.

The product of its digits is 6912, while the sum is 32.

The square root of 1224421619 is about 34991.7364387651. The cubic root of 1224421619 is about 1069.8190566597.

The spelling of 1224421619 in words is "one billion, two hundred twenty-four million, four hundred twenty-one thousand, six hundred nineteen".