1223440142 has 16 divisors (see below), whose sum is σ = 1863174960. Its totient is φ = 602407872.

The previous prime is 1223440133. The next prime is 1223440147. The reversal of 1223440142 is 2410443221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223440147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93584 + ... + 105852.

It is an arithmetic number, because the mean of its divisors is an integer number (116448435).

Almost surely, 2^1223440142 is an apocalyptic number.

1223440142 is a deficient number, since it is larger than the sum of its proper divisors (639734818).

1223440142 is a wasteful number, since it uses less digits than its factorization.

1223440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1223440142 is about 34977.7092160136. The cubic root of 1223440142 is about 1069.5331302374.

Adding to 1223440142 its reverse (2410443221), we get a palindrome (3633883363).

The spelling of 1223440142 in words is "one billion, two hundred twenty-three million, four hundred forty thousand, one hundred forty-two".