12305647261 has 2 divisors, whose sum is σ = 12305647262. Its totient is φ = 12305647260.

The previous prime is 12305647201. The next prime is 12305647267. The reversal of 12305647261 is 16274650321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11161922500 + 1143724761 = 105650^2 + 33819^2 .

It is an emirp because it is prime and its reverse (16274650321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12305647261 - 2²⁵ = 12272092829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12305647261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12305647267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152823630 + 6152823631.

It is an arithmetic number, because the mean of its divisors is an integer number (6152823631).

Almost surely, 2^12305647261 is an apocalyptic number.

It is an amenable number.

12305647261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12305647261 is an equidigital number, since it uses as much as digits as its factorization.

12305647261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 12305647261 in words is "twelve billion, three hundred five million, six hundred forty-seven thousand, two hundred sixty-one".