129260262457 has 2 divisors, whose sum is σ = 129260262458. Its totient is φ = 129260262456.

The previous prime is 129260262449. The next prime is 129260262503. The reversal of 129260262457 is 754262062921.

It is an a-pointer prime, because the next prime (129260262503) can be obtained adding 129260262457 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124770726441 + 4489536016 = 353229^2 + 67004^2 .

It is a cyclic number.

It is not a de Polignac number, because 129260262457 - 2³ = 129260262449 is a prime.

It is not a weakly prime, because it can be changed into another prime (129260262437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64630131228 + 64630131229.

It is an arithmetic number, because the mean of its divisors is an integer number (64630131229).

Almost surely, 2^129260262457 is an apocalyptic number.

It is an amenable number.

129260262457 is a deficient number, since it is larger than the sum of its proper divisors (1).

129260262457 is an equidigital number, since it uses as much as digits as its factorization.

129260262457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 129260262457 in words is "one hundred twenty-nine billion, two hundred sixty million, two hundred sixty-two thousand, four hundred fifty-seven".