1306249039 has 2 divisors, whose sum is σ = 1306249040. Its totient is φ = 1306249038.

The previous prime is 1306249019. The next prime is 1306249123. The reversal of 1306249039 is 9309426031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1306249039 - 2¹⁵ = 1306216271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1306248989 and 1306249007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306249019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653124519 + 653124520.

It is an arithmetic number, because the mean of its divisors is an integer number (653124520).

Almost surely, 2^1306249039 is an apocalyptic number.

1306249039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306249039 is an equidigital number, since it uses as much as digits as its factorization.

1306249039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 1306249039 is about 36142.0674422480. The cubic root of 1306249039 is about 1093.1388465799.

The spelling of 1306249039 in words is "one billion, three hundred six million, two hundred forty-nine thousand, thirty-nine".