1325522161 has 2 divisors, whose sum is σ = 1325522162. Its totient is φ = 1325522160.

The previous prime is 1325522129. The next prime is 1325522173. The reversal of 1325522161 is 1612255231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 775901025 + 549621136 = 27855^2 + 23444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325522161 - 2⁵ = 1325522129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1325522461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662761080 + 662761081.

It is an arithmetic number, because the mean of its divisors is an integer number (662761081).

Almost surely, 2^1325522161 is an apocalyptic number.

It is an amenable number.

1325522161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325522161 is an equidigital number, since it uses as much as digits as its factorization.

1325522161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 1325522161 is about 36407.7211728501. The cubic root of 1325522161 is about 1098.4888784957.

Adding to 1325522161 its reverse (1612255231), we get a palindrome (2937777392).

The spelling of 1325522161 in words is "one billion, three hundred twenty-five million, five hundred twenty-two thousand, one hundred sixty-one".