1323140442 has 32 divisors (see below), whose sum is σ = 2903620608. Its totient is φ = 399437376.

The previous prime is 1323140437. The next prime is 1323140443. The reversal of 1323140442 is 2440413231.

It is not an unprimeable number, because it can be changed into a prime (1323140443) 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, 155898 + ... + 164165.

It is an arithmetic number, because the mean of its divisors is an integer number (90738144).

Almost surely, 2^1323140442 is an apocalyptic number.

1323140442 is an abundant number, since it is smaller than the sum of its proper divisors (1580480166).

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

1323140442 is a wasteful number, since it uses less digits than its factorization.

1323140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320134.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1323140442 is about 36374.9974845360. The cubic root of 1323140442 is about 1097.8305566976.

Adding to 1323140442 its reverse (2440413231), we get a palindrome (3763553673).

The spelling of 1323140442 in words is "one billion, three hundred twenty-three million, one hundred forty thousand, four hundred forty-two".