1320321232 has 20 divisors (see below), whose sum is σ = 2558692260. Its totient is φ = 660013568.

The previous prime is 1320321161. The next prime is 1320321241. The reversal of 1320321232 is 2321230231.

It can be written as a sum of positive squares in 2 ways, for example, as 800663616 + 519657616 = 28296^2 + 22796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119394 + ... + 129982.

It is an arithmetic number, because the mean of its divisors is an integer number (127934613).

Almost surely, 2^1320321232 is an apocalyptic number.

It is an amenable number.

1320321232 is a deficient number, since it is larger than the sum of its proper divisors (1238371028).

1320321232 is a wasteful number, since it uses less digits than its factorization.

1320321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390 (or 18384 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1320321232 is about 36336.2247901457. The cubic root of 1320321232 is about 1097.0502878842.

Adding to 1320321232 its reverse (2321230231), we get a palindrome (3641551463).

The spelling of 1320321232 in words is "one billion, three hundred twenty million, three hundred twenty-one thousand, two hundred thirty-two".