1321321432 has 64 divisors (see below), whose sum is σ = 2710713600. Its totient is φ = 602112000.

The previous prime is 1321321381. The next prime is 1321321433. The reversal of 1321321432 is 2341231231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321321433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292632 + ... + 297112.

It is an arithmetic number, because the mean of its divisors is an integer number (42354900).

Almost surely, 2^1321321432 is an apocalyptic number.

It is an amenable number.

1321321432 is an abundant number, since it is smaller than the sum of its proper divisors (1389392168).

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

1321321432 is a wasteful number, since it uses less digits than its factorization.

1321321432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588 (or 4584 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1321321432 is about 36349.9853094881. The cubic root of 1321321432 is about 1097.3272388543.

Adding to 1321321432 its reverse (2341231231), we get a palindrome (3662552663).

The spelling of 1321321432 in words is "one billion, three hundred twenty-one million, three hundred twenty-one thousand, four hundred thirty-two".