1320325405 has 16 divisors (see below), whose sum is σ = 1832552064. Its totient is φ = 894456000.

The previous prime is 1320325397. The next prime is 1320325441. The reversal of 1320325405 is 5045230231.

It is not a de Polignac number, because 1320325405 - 2³ = 1320325397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320325405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224346 + ... + 230155.

It is an arithmetic number, because the mean of its divisors is an integer number (114534504).

Almost surely, 2^1320325405 is an apocalyptic number.

It is an amenable number.

1320325405 is a deficient number, since it is larger than the sum of its proper divisors (512226659).

1320325405 is an equidigital number, since it uses as much as digits as its factorization.

1320325405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454596.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1320325405 is about 36336.2822121361. The cubic root of 1320325405 is about 1097.0514436600.

Adding to 1320325405 its reverse (5045230231), we get a palindrome (6365555636).

The spelling of 1320325405 in words is "one billion, three hundred twenty million, three hundred twenty-five thousand, four hundred five".