1325320111 has 4 divisors (see below), whose sum is σ = 1326131352. Its totient is φ = 1324508872.

The previous prime is 1325320109. The next prime is 1325320133. The reversal of 1325320111 is 1110235231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1325320111 - 2¹ = 1325320109 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 (1325320211) 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, 403165 + ... + 406438.

It is an arithmetic number, because the mean of its divisors is an integer number (331532838).

Almost surely, 2^1325320111 is an apocalyptic number.

1325320111 is a deficient number, since it is larger than the sum of its proper divisors (811241).

1325320111 is an equidigital number, since it uses as much as digits as its factorization.

1325320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811240.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1325320111 is about 36404.9462436082. The cubic root of 1325320111 is about 1098.4330612582.

Adding to 1325320111 its reverse (1110235231), we get a palindrome (2435555342).

The spelling of 1325320111 in words is "one billion, three hundred twenty-five million, three hundred twenty thousand, one hundred eleven".