1325641549 has 2 divisors, whose sum is σ = 1325641550. Its totient is φ = 1325641548.

The previous prime is 1325641523. The next prime is 1325641553. The reversal of 1325641549 is 9451465231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871312324 + 454329225 = 29518^2 + 21315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325641549 - 2¹¹ = 1325639501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325641579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662820774 + 662820775.

It is an arithmetic number, because the mean of its divisors is an integer number (662820775).

Almost surely, 2^1325641549 is an apocalyptic number.

It is an amenable number.

1325641549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325641549 is an equidigital number, since it uses as much as digits as its factorization.

1325641549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 1325641549 is about 36409.3607331961. The cubic root of 1325641549 is about 1098.5218573114.

The spelling of 1325641549 in words is "one billion, three hundred twenty-five million, six hundred forty-one thousand, five hundred forty-nine".