1322521397 has 2 divisors, whose sum is σ = 1322521398. Its totient is φ = 1322521396.

The previous prime is 1322521357. The next prime is 1322521427. The reversal of 1322521397 is 7931252231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 920879716 + 401641681 = 30346^2 + 20041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322521397 - 2²⁶ = 1255412533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322521327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661260698 + 661260699.

It is an arithmetic number, because the mean of its divisors is an integer number (661260699).

Almost surely, 2^1322521397 is an apocalyptic number.

It is an amenable number.

1322521397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322521397 is an equidigital number, since it uses as much as digits as its factorization.

1322521397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 1322521397 is about 36366.4872788121. The cubic root of 1322521397 is about 1097.6593195133.

The spelling of 1322521397 in words is "one billion, three hundred twenty-two million, five hundred twenty-one thousand, three hundred ninety-seven".