129865242247 has 16 divisors (see below), whose sum is σ = 140399723520. Its totient is φ = 119408889600.

The previous prime is 129865242197. The next prime is 129865242251. The reversal of 129865242247 is 742242568921.

It is not a de Polignac number, because 129865242247 - 2²⁷ = 129731024519 is a prime.

It is a super-2 number, since 2×129865242247² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129865242194 and 129865242203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129865242257) 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 in 15 ways as a sum of consecutive naturals, for example, 20705722 + ... + 20711992.

It is an arithmetic number, because the mean of its divisors is an integer number (8774982720).

Almost surely, 2^129865242247 is an apocalyptic number.

129865242247 is a deficient number, since it is larger than the sum of its proper divisors (10534481273).

129865242247 is a wasteful number, since it uses less digits than its factorization.

129865242247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234.

The product of its digits is 3870720, while the sum is 52.

The spelling of 129865242247 in words is "one hundred twenty-nine billion, eight hundred sixty-five million, two hundred forty-two thousand, two hundred forty-seven".