1223205142 has 32 divisors (see below), whose sum is σ = 1972965600. Its totient is φ = 567072000.

The previous prime is 1223205119. The next prime is 1223205149. The reversal of 1223205142 is 2415023221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223205149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339792 + ... + 343372.

It is an arithmetic number, because the mean of its divisors is an integer number (61655175).

Almost surely, 2^1223205142 is an apocalyptic number.

1223205142 is a deficient number, since it is larger than the sum of its proper divisors (749760458).

1223205142 is a wasteful number, since it uses less digits than its factorization.

1223205142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1223205142 is about 34974.3497723689. The cubic root of 1223205142 is about 1069.4646467399.

Adding to 1223205142 its reverse (2415023221), we get a palindrome (3638228363).

The spelling of 1223205142 in words is "one billion, two hundred twenty-three million, two hundred five thousand, one hundred forty-two".