1325641553 has 2 divisors, whose sum is σ = 1325641554. Its totient is φ = 1325641552.

The previous prime is 1325641549. The next prime is 1325641573. The reversal of 1325641553 is 3551465231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1324086544 + 1555009 = 36388^2 + 1247^2 .

It is an emirp because it is prime and its reverse (3551465231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1325641553 - 2² = 1325641549 is a prime.

It is not a weakly prime, because it can be changed into another prime (1325641523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662820776 + 662820777.

It is an arithmetic number, because the mean of its divisors is an integer number (662820777).

Almost surely, 2^1325641553 is an apocalyptic number.

It is an amenable number.

1325641553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325641553 is an equidigital number, since it uses as much as digits as its factorization.

1325641553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 35.

The square root of 1325641553 is about 36409.3607881270. The cubic root of 1325641553 is about 1098.5218584163.

The spelling of 1325641553 in words is "one billion, three hundred twenty-five million, six hundred forty-one thousand, five hundred fifty-three".