1320325421 has 4 divisors (see below), whose sum is σ = 1325463132. Its totient is φ = 1315187712.

The previous prime is 1320325397. The next prime is 1320325441. The reversal of 1320325421 is 1245230231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1245230231 = 7 ⋅177890033.

It can be written as a sum of positive squares in 2 ways, for example, as 1263020521 + 57304900 = 35539^2 + 7570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320325421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320325441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568470 + ... + 2568983.

It is an arithmetic number, because the mean of its divisors is an integer number (331365783).

Almost surely, 2^1320325421 is an apocalyptic number.

It is an amenable number.

1320325421 is a deficient number, since it is larger than the sum of its proper divisors (5137711).

1320325421 is an equidigital number, since it uses as much as digits as its factorization.

1320325421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137710.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1320325421 is about 36336.2824323017. The cubic root of 1320325421 is about 1097.0514480915.

Adding to 1320325421 its reverse (1245230231), we get a palindrome (2565555652).

The spelling of 1320325421 in words is "one billion, three hundred twenty million, three hundred twenty-five thousand, four hundred twenty-one".