1325030521 has 4 divisors (see below), whose sum is σ = 1325106000. Its totient is φ = 1324955044.

The previous prime is 1325030513. The next prime is 1325030527. The reversal of 1325030521 is 1250305231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1325030521 - 2³ = 1325030513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1325030492 and 1325030501.

It is not an unprimeable number, because it can be changed into a prime (1325030527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3930 + ... + 51628.

It is an arithmetic number, because the mean of its divisors is an integer number (331276500).

Almost surely, 2^1325030521 is an apocalyptic number.

It is an amenable number.

1325030521 is a deficient number, since it is larger than the sum of its proper divisors (75479).

1325030521 is an equidigital number, since it uses as much as digits as its factorization.

1325030521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75478.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1325030521 is about 36400.9686821656. The cubic root of 1325030521 is about 1098.3530508016.

Adding to 1325030521 its reverse (1250305231), we get a palindrome (2575335752).

The spelling of 1325030521 in words is "one billion, three hundred twenty-five million, thirty thousand, five hundred twenty-one".