1316209 has 2 divisors, whose sum is σ = 1316210. Its totient is φ = 1316208.

The previous prime is 1316177. The next prime is 1316213. The reversal of 1316209 is 9026131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 5184 = 1145^2 + 72^2 .

It is an emirp because it is prime and its reverse (9026131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1316209 - 2⁵ = 1316177 is a prime.

It is a super-2 number, since 2×1316209² = 3464812263362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1316209.

It is not a weakly prime, because it can be changed into another prime (1316239) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658104 + 658105.

It is an arithmetic number, because the mean of its divisors is an integer number (658105).

2^1316209 is an apocalyptic number.

It is an amenable number.

1316209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316209 is an equidigital number, since it uses as much as digits as its factorization.

1316209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1316209 is about 1147.2615220602. The cubic root of 1316209 is about 109.5910157002.

The spelling of 1316209 in words is "one million, three hundred sixteen thousand, two hundred nine".