1223616142 has 32 divisors (see below), whose sum is σ = 2186035200. Its totient is φ = 513235800.

The previous prime is 1223616133. The next prime is 1223616143. The reversal of 1223616142 is 2416163221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223616142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223616143) 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 15 ways as a sum of consecutive naturals, for example, 13267 + ... + 51217.

It is an arithmetic number, because the mean of its divisors is an integer number (68313600).

Almost surely, 2^1223616142 is an apocalyptic number.

1223616142 is a deficient number, since it is larger than the sum of its proper divisors (962419058).

1223616142 is an equidigital number, since it uses as much as digits as its factorization.

1223616142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38021 (or 38007 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 1223616142 is about 34980.2250135702. The cubic root of 1223616142 is about 1069.5844142626.

Adding to 1223616142 its reverse (2416163221), we get a palindrome (3639779363).

The spelling of 1223616142 in words is "one billion, two hundred twenty-three million, six hundred sixteen thousand, one hundred forty-two".