129260262449 has 2 divisors, whose sum is σ = 129260262450. Its totient is φ = 129260262448.

The previous prime is 129260262437. The next prime is 129260262457. The reversal of 129260262449 is 944262062921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127980054049 + 1280208400 = 357743^2 + 35780^2 .

It is an emirp because it is prime and its reverse (944262062921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129260262449 - 2⁸ = 129260262193 is a prime.

It is not a weakly prime, because it can be changed into another prime (129260262949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64630131224 + 64630131225.

It is an arithmetic number, because the mean of its divisors is an integer number (64630131225).

Almost surely, 2^129260262449 is an apocalyptic number.

It is an amenable number.

129260262449 is a deficient number, since it is larger than the sum of its proper divisors (1).

129260262449 is an equidigital number, since it uses as much as digits as its factorization.

129260262449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 129260262449 in words is "one hundred twenty-nine billion, two hundred sixty million, two hundred sixty-two thousand, four hundred forty-nine".