1306817 has 2 divisors, whose sum is σ = 1306818. Its totient is φ = 1306816.

The previous prime is 1306777. The next prime is 1306819. The reversal of 1306817 is 7186031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 50176 = 1121^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306817 - 2¹⁴ = 1290433 is a prime.

Together with 1306819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1306819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653408 + 653409.

It is an arithmetic number, because the mean of its divisors is an integer number (653409).

2^1306817 is an apocalyptic number.

It is an amenable number.

1306817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306817 is an equidigital number, since it uses as much as digits as its factorization.

1306817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1306817 is about 1143.1609685429. The cubic root of 1306817 is about 109.3297256973.

The spelling of 1306817 in words is "one million, three hundred six thousand, eight hundred seventeen".