1224612555 has 16 divisors (see below), whose sum is σ = 1992591360. Its totient is φ = 642056288.

The previous prime is 1224612517. The next prime is 1224612581. The reversal of 1224612555 is 5552164221.

It is a cyclic number.

It is not a de Polignac number, because 1224612555 - 2⁹ = 1224612043 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 690987 + ... + 692756.

It is an arithmetic number, because the mean of its divisors is an integer number (124536960).

Almost surely, 2^1224612555 is an apocalyptic number.

1224612555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1224612555 is a deficient number, since it is larger than the sum of its proper divisors (767978805).

1224612555 is a wasteful number, since it uses less digits than its factorization.

1224612555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383810.

The product of its digits is 24000, while the sum is 33.

The square root of 1224612555 is about 34994.4646337103. The cubic root of 1224612555 is about 1069.8746628744.

Adding to 1224612555 its reverse (5552164221), we get a palindrome (6776776776).

The spelling of 1224612555 in words is "one billion, two hundred twenty-four million, six hundred twelve thousand, five hundred fifty-five".