1306249123 has 2 divisors, whose sum is σ = 1306249124. Its totient is φ = 1306249122.

The previous prime is 1306249039. The next prime is 1306249127. The reversal of 1306249123 is 3219426031.

It is a strong prime.

It is an emirp because it is prime and its reverse (3219426031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306249123 - 2¹³ = 1306240931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306249127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653124561 + 653124562.

It is an arithmetic number, because the mean of its divisors is an integer number (653124562).

Almost surely, 2^1306249123 is an apocalyptic number.

1306249123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306249123 is an equidigital number, since it uses as much as digits as its factorization.

1306249123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1306249123 is about 36142.0686043287. The cubic root of 1306249123 is about 1093.1388700118.

The spelling of 1306249123 in words is "one billion, three hundred six million, two hundred forty-nine thousand, one hundred twenty-three".