1321004442 has 8 divisors (see below), whose sum is σ = 2642008896. Its totient is φ = 440334812.

The previous prime is 1321004441. The next prime is 1321004449. The reversal of 1321004442 is 2444001231.

It is a sphenic number, since it is the product of 3 distinct primes.

1321004442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1321004441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110083698 + ... + 110083709.

It is an arithmetic number, because the mean of its divisors is an integer number (330251112).

Almost surely, 2^1321004442 is an apocalyptic number.

1321004442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1321004442 is a wasteful number, since it uses less digits than its factorization.

1321004442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220167412.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1321004442 is about 36345.6247985916. The cubic root of 1321004442 is about 1097.2394808537.

Adding to 1321004442 its reverse (2444001231), we get a palindrome (3765005673).

The spelling of 1321004442 in words is "one billion, three hundred twenty-one million, four thousand, four hundred forty-two".