1296422321 has 2 divisors, whose sum is σ = 1296422322. Its totient is φ = 1296422320.

The previous prime is 1296422249. The next prime is 1296422333. The reversal of 1296422321 is 1232246921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724686400 + 571735921 = 26920^2 + 23911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296422321 - 2¹⁰ = 1296421297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1296422381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648211160 + 648211161.

It is an arithmetic number, because the mean of its divisors is an integer number (648211161).

Almost surely, 2^1296422321 is an apocalyptic number.

It is an amenable number.

1296422321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296422321 is an equidigital number, since it uses as much as digits as its factorization.

1296422321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 1296422321 is about 36005.8650916764. The cubic root of 1296422321 is about 1090.3907700270.

The spelling of 1296422321 in words is "one billion, two hundred ninety-six million, four hundred twenty-two thousand, three hundred twenty-one".