1325243324521 has 4 divisors (see below), whose sum is σ = 1394992973200. Its totient is φ = 1255493675844.

The previous prime is 1325243324519. The next prime is 1325243324579. The reversal of 1325243324521 is 1254233425231.

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.

It is a cyclic number.

It is not a de Polignac number, because 1325243324521 - 2¹ = 1325243324519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325243324591) 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, 34874824311 + ... + 34874824348.

It is an arithmetic number, because the mean of its divisors is an integer number (348748243300).

Almost surely, 2^{1325243324521} is an apocalyptic number.

It is an amenable number.

1325243324521 is a deficient number, since it is larger than the sum of its proper divisors (69749648679).

1325243324521 is an equidigital number, since it uses as much as digits as its factorization.

1325243324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69749648678.

The product of its digits is 172800, while the sum is 37.

Adding to 1325243324521 its reverse (1254233425231), we get a palindrome (2579476749752).

The spelling of 1325243324521 in words is "one trillion, three hundred twenty-five billion, two hundred forty-three million, three hundred twenty-four thousand, five hundred twenty-one".