129506512 has 20 divisors (see below), whose sum is σ = 257701636. Its totient is φ = 63002880.

The previous prime is 129506483. The next prime is 129506519. The reversal of 129506512 is 215605921.

It can be written as a sum of positive squares in 2 ways, for example, as 102090816 + 27415696 = 10104^2 + 5236^2 .

It is a super-2 number, since 2×129506512² = 33543873300812288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129506519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108789 + ... + 109972.

Almost surely, 2^129506512 is an apocalyptic number.

It is an amenable number.

129506512 is a deficient number, since it is larger than the sum of its proper divisors (128195124).

129506512 is a wasteful number, since it uses less digits than its factorization.

129506512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218806 (or 218800 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 129506512 is about 11380.0927939978. The cubic root of 129506512 is about 505.9378865259.

The spelling of 129506512 in words is "one hundred twenty-nine million, five hundred six thousand, five hundred twelve".