1224201605 has 16 divisors (see below), whose sum is σ = 1624549824. Its totient is φ = 878129280.

The previous prime is 1224201599. The next prime is 1224201613. The reversal of 1224201605 is 5061024221.

It is a happy number.

It is not a de Polignac number, because 1224201605 - 2¹⁰ = 1224200581 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 148439 + ... + 156468.

It is an arithmetic number, because the mean of its divisors is an integer number (101534364).

Almost surely, 2^1224201605 is an apocalyptic number.

It is an amenable number.

1224201605 is a deficient number, since it is larger than the sum of its proper divisors (400348219).

1224201605 is a wasteful number, since it uses less digits than its factorization.

1224201605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304996.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1224201605 is about 34988.5924981272. The cubic root of 1224201605 is about 1069.7549749017.

Adding to 1224201605 its reverse (5061024221), we get a palindrome (6285225826).

The spelling of 1224201605 in words is "one billion, two hundred twenty-four million, two hundred one thousand, six hundred five".