1223605120 has 64 divisors (see below), whose sum is σ = 3026095200. Its totient is φ = 472557568.

The previous prime is 1223605087. The next prime is 1223605147. The reversal of 1223605120 is 215063221.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1223605091 and 1223605100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14404 + ... + 51523.

Almost surely, 2^1223605120 is an apocalyptic number.

1223605120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223605120 is an abundant number, since it is smaller than the sum of its proper divisors (1802490080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223605120 is an equidigital number, since it uses as much as digits as its factorization.

1223605120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65975 (or 65963 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1223605120 is about 34980.0674670590. The cubic root of 1223605120 is about 1069.5812027449.

Adding to 1223605120 its reverse (215063221), we get a palindrome (1438668341).

The spelling of 1223605120 in words is "one billion, two hundred twenty-three million, six hundred five thousand, one hundred twenty".