1306129501 has 2 divisors, whose sum is σ = 1306129502. Its totient is φ = 1306129500.

The previous prime is 1306129493. The next prime is 1306129511. The reversal of 1306129501 is 1059216031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726572025 + 579557476 = 26955^2 + 24074^2 .

It is an emirp because it is prime and its reverse (1059216031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306129501 - 2³ = 1306129493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1306129501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306129511) 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, 653064750 + 653064751.

It is an arithmetic number, because the mean of its divisors is an integer number (653064751).

Almost surely, 2^1306129501 is an apocalyptic number.

It is an amenable number.

1306129501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306129501 is an equidigital number, since it uses as much as digits as its factorization.

1306129501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1306129501 is about 36140.4136805322. The cubic root of 1306129501 is about 1093.1055003053.

The spelling of 1306129501 in words is "one billion, three hundred six million, one hundred twenty-nine thousand, five hundred one".