1320811432 has 24 divisors (see below), whose sum is σ = 2588886090. Its totient is φ = 631690400.

The previous prime is 1320811417. The next prime is 1320811469. The reversal of 1320811432 is 2341180231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1317254436 + 3556996 = 36294^2 + 1886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320811397 and 1320811406.

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 5 ways as a sum of consecutive naturals, for example, 151819 + ... + 160282.

Almost surely, 2^1320811432 is an apocalyptic number.

It is an amenable number.

1320811432 is a deficient number, since it is larger than the sum of its proper divisors (1268074658).

1320811432 is a wasteful number, since it uses less digits than its factorization.

1320811432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312153 (or 312126 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1320811432 is about 36342.9694989278. The cubic root of 1320811432 is about 1097.1860395730.

Adding to 1320811432 its reverse (2341180231), we get a palindrome (3661991663).

The spelling of 1320811432 in words is "one billion, three hundred twenty million, eight hundred eleven thousand, four hundred thirty-two".