1325351221 has 4 divisors (see below), whose sum is σ = 1341319392. Its totient is φ = 1309383052.

The previous prime is 1325351197. The next prime is 1325351233. The reversal of 1325351221 is 1221535231.

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: 1221535231 = 7 ⋅174505033.

It is a cyclic number.

It is not a de Polignac number, because 1325351221 - 2¹¹ = 1325349173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325351921) 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, 7983961 + ... + 7984126.

It is an arithmetic number, because the mean of its divisors is an integer number (335329848).

Almost surely, 2^1325351221 is an apocalyptic number.

It is an amenable number.

1325351221 is a deficient number, since it is larger than the sum of its proper divisors (15968171).

1325351221 is an equidigital number, since it uses as much as digits as its factorization.

1325351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15968170.

The product of its digits is 1800, while the sum is 25.

The square root of 1325351221 is about 36405.3735182047. The cubic root of 1325351221 is about 1098.4416559076.

Adding to 1325351221 its reverse (1221535231), we get a palindrome (2546886452).

The spelling of 1325351221 in words is "one billion, three hundred twenty-five million, three hundred fifty-one thousand, two hundred twenty-one".