1325558321 has 4 divisors (see below), whose sum is σ = 1326034032. Its totient is φ = 1325082612.

The previous prime is 1325558261. The next prime is 1325558327. The reversal of 1325558321 is 1238555231.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 1238555231 = 733 ⋅1689707.

It is a cyclic number.

It is not a de Polignac number, because 1325558321 - 2¹⁴ = 1325541937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325558327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233651 + ... + 239256.

It is an arithmetic number, because the mean of its divisors is an integer number (331508508).

Almost surely, 2^1325558321 is an apocalyptic number.

It is an amenable number.

1325558321 is a deficient number, since it is larger than the sum of its proper divisors (475711).

1325558321 is an equidigital number, since it uses as much as digits as its factorization.

1325558321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475710.

The product of its digits is 36000, while the sum is 35.

The square root of 1325558321 is about 36408.2177674217. The cubic root of 1325558321 is about 1098.4988672629.

The spelling of 1325558321 in words is "one billion, three hundred twenty-five million, five hundred fifty-eight thousand, three hundred twenty-one".