1322521009 has 2 divisors, whose sum is σ = 1322521010. Its totient is φ = 1322521008.

The previous prime is 1322521003. The next prime is 1322521019. The reversal of 1322521009 is 9001252231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700766784 + 621754225 = 26472^2 + 24935^2 .

It is an emirp because it is prime and its reverse (9001252231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1322521009 - 2²¹ = 1320423857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1322521003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661260504 + 661260505.

It is an arithmetic number, because the mean of its divisors is an integer number (661260505).

Almost surely, 2^1322521009 is an apocalyptic number.

It is an amenable number.

1322521009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322521009 is an equidigital number, since it uses as much as digits as its factorization.

1322521009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1322521009 is about 36366.4819442299. The cubic root of 1322521009 is about 1097.6592121698.

The spelling of 1322521009 in words is "one billion, three hundred twenty-two million, five hundred twenty-one thousand, nine".