1328121325 has 6 divisors (see below), whose sum is σ = 1646870474. Its totient is φ = 1062497040.

The previous prime is 1328121307. The next prime is 1328121373. The reversal of 1328121325 is 5231218231.

It can be written as a sum of positive squares in 3 ways, for example, as 258373476 + 1069747849 = 16074^2 + 32707^2 .

It is not a de Polignac number, because 1328121325 - 2¹³ = 1328113133 is a prime.

It is a super-3 number, since 3×1328121325³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328121293 and 1328121302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26562402 + ... + 26562451.

Almost surely, 2^1328121325 is an apocalyptic number.

It is an amenable number.

1328121325 is a deficient number, since it is larger than the sum of its proper divisors (318749149).

1328121325 is an equidigital number, since it uses as much as digits as its factorization.

1328121325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53124863 (or 53124858 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1328121325 is about 36443.3989221642. The cubic root of 1328121325 is about 1099.2064041814.

Adding to 1328121325 its reverse (5231218231), we get a palindrome (6559339556).

The spelling of 1328121325 in words is "one billion, three hundred twenty-eight million, one hundred twenty-one thousand, three hundred twenty-five".