1306289 has 2 divisors, whose sum is σ = 1306290. Its totient is φ = 1306288.

The previous prime is 1306273. The next prime is 1306313. The reversal of 1306289 is 9826031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 85264 = 1105^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306289 - 2⁴ = 1306273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653144 + 653145.

It is an arithmetic number, because the mean of its divisors is an integer number (653145).

2^1306289 is an apocalyptic number.

It is an amenable number.

1306289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306289 is an equidigital number, since it uses as much as digits as its factorization.

1306289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1306289 is about 1142.9300066058. The cubic root of 1306289 is about 109.3149993631.

The spelling of 1306289 in words is "one million, three hundred six thousand, two hundred eighty-nine".