1306387 has 2 divisors, whose sum is σ = 1306388. Its totient is φ = 1306386.

The previous prime is 1306381. The next prime is 1306391. The reversal of 1306387 is 7836031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1306387 - 2⁷ = 1306259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306381) 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, 653193 + 653194.

It is an arithmetic number, because the mean of its divisors is an integer number (653194).

2^1306387 is an apocalyptic number.

1306387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306387 is an equidigital number, since it uses as much as digits as its factorization.

1306387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1306387 is about 1142.9728780684. The cubic root of 1306387 is about 109.3177329599.

The spelling of 1306387 in words is "one million, three hundred six thousand, three hundred eighty-seven".