1325103521 has 12 divisors (see below), whose sum is σ = 1542110832. Its totient is φ = 1135313928.

The previous prime is 1325103511. The next prime is 1325103553. The reversal of 1325103521 is 1253015231.

It is a happy number.

It is not a de Polignac number, because 1325103521 - 2⁶ = 1325103457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325103511) 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 11 ways as a sum of consecutive naturals, for example, 152726 + ... + 161168.

It is an arithmetic number, because the mean of its divisors is an integer number (128509236).

Almost surely, 2^1325103521 is an apocalyptic number.

It is an amenable number.

1325103521 is a deficient number, since it is larger than the sum of its proper divisors (217007311).

1325103521 is an equidigital number, since it uses as much as digits as its factorization.

1325103521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660 (or 11653 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1325103521 is about 36401.9713889234. The cubic root of 1325103521 is about 1098.3732209786.

Adding to 1325103521 its reverse (1253015231), we get a palindrome (2578118752).

The spelling of 1325103521 in words is "one billion, three hundred twenty-five million, one hundred three thousand, five hundred twenty-one".