1321040344 has 16 divisors (see below), whose sum is σ = 2667485520. Its totient is φ = 609710880.

The previous prime is 1321040269. The next prime is 1321040353. The reversal of 1321040344 is 4430401231.

It is a congruent number.

It is an unprimeable number.

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, 6351052 + ... + 6351259.

It is an arithmetic number, because the mean of its divisors is an integer number (166717845).

Almost surely, 2^1321040344 is an apocalyptic number.

It is an amenable number.

1321040344 is an abundant number, since it is smaller than the sum of its proper divisors (1346445176).

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

1321040344 is a wasteful number, since it uses less digits than its factorization.

1321040344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12702330 (or 12702326 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1321040344 is about 36346.1186923721. The cubic root of 1321040344 is about 1097.2494209502.

Adding to 1321040344 its reverse (4430401231), we get a palindrome (5751441575).

The spelling of 1321040344 in words is "one billion, three hundred twenty-one million, forty thousand, three hundred forty-four".