1307209 has 2 divisors, whose sum is σ = 1307210. Its totient is φ = 1307208.

The previous prime is 1307197. The next prime is 1307221. The reversal of 1307209 is 9027031.

It is a balanced prime because it is at equal distance from previous prime (1307197) and next prime (1307221).

It can be written as a sum of positive squares in only one way, i.e., 855625 + 451584 = 925^2 + 672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307209 - 2⁷ = 1307081 is a prime.

1307209 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1307209.

It is not a weakly prime, because it can be changed into another prime (1307309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653604 + 653605.

It is an arithmetic number, because the mean of its divisors is an integer number (653605).

2^1307209 is an apocalyptic number.

It is an amenable number.

1307209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307209 is an equidigital number, since it uses as much as digits as its factorization.

1307209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1307209 is about 1143.3324101065. The cubic root of 1307209 is about 109.3406563193.

The spelling of 1307209 in words is "one million, three hundred seven thousand, two hundred nine".