1321443242 has 16 divisors (see below), whose sum is σ = 2363824512. Its totient is φ = 541709520.

The previous prime is 1321443209. The next prime is 1321443251. The reversal of 1321443242 is 2423441231.

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, 2051609 + ... + 2052252.

It is an arithmetic number, because the mean of its divisors is an integer number (147739032).

Almost surely, 2^1321443242 is an apocalyptic number.

1321443242 is a deficient number, since it is larger than the sum of its proper divisors (1042381270).

1321443242 is a wasteful number, since it uses less digits than its factorization.

1321443242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103893.

The product of its digits is 4608, while the sum is 26.

The square root of 1321443242 is about 36351.6607873698. The cubic root of 1321443242 is about 1097.3609579582.

Adding to 1321443242 its reverse (2423441231), we get a palindrome (3744884473).

The spelling of 1321443242 in words is "one billion, three hundred twenty-one million, four hundred forty-three thousand, two hundred forty-two".