1321465217 has 2 divisors, whose sum is σ = 1321465218. Its totient is φ = 1321465216.

The previous prime is 1321465183. The next prime is 1321465231. The reversal of 1321465217 is 7125641231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200553201 + 120912016 = 34649^2 + 10996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321465217 - 2¹⁴ = 1321448833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321465237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660732608 + 660732609.

It is an arithmetic number, because the mean of its divisors is an integer number (660732609).

Almost surely, 2^1321465217 is an apocalyptic number.

It is an amenable number.

1321465217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321465217 is an equidigital number, since it uses as much as digits as its factorization.

1321465217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 1321465217 is about 36351.9630419046. The cubic root of 1321465217 is about 1097.3670407956.

The spelling of 1321465217 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, two hundred seventeen".