1325805641 has 2 divisors, whose sum is σ = 1325805642. Its totient is φ = 1325805640.

The previous prime is 1325805631. The next prime is 1325805661. The reversal of 1325805641 is 1465085231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200276025 + 125529616 = 34645^2 + 11204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325805641 - 2⁶ = 1325805577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1325805601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662902820 + 662902821.

It is an arithmetic number, because the mean of its divisors is an integer number (662902821).

Almost surely, 2^1325805641 is an apocalyptic number.

It is an amenable number.

1325805641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325805641 is an equidigital number, since it uses as much as digits as its factorization.

1325805641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1325805641 is about 36411.6140949560. The cubic root of 1325805641 is about 1098.5671815827.

The spelling of 1325805641 in words is "one billion, three hundred twenty-five million, eight hundred five thousand, six hundred forty-one".