1142321144 has 32 divisors (see below), whose sum is σ = 2195424000. Its totient is φ = 556920672.

The previous prime is 1142321113. The next prime is 1142321161. The reversal of 1142321144 is 4411232411.

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, 224177 + ... + 229215.

It is an arithmetic number, because the mean of its divisors is an integer number (68607000).

Almost surely, 2^1142321144 is an apocalyptic number.

It is an amenable number.

1142321144 is a deficient number, since it is larger than the sum of its proper divisors (1053102856).

1142321144 is a wasteful number, since it uses less digits than its factorization.

1142321144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747 (or 5743 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 1142321144 is about 33798.2417294155. The cubic root of 1142321144 is about 1045.3524429505.

Adding to 1142321144 its reverse (4411232411), we get a palindrome (5553553555).

The spelling of 1142321144 in words is "one billion, one hundred forty-two million, three hundred twenty-one thousand, one hundred forty-four".