129209130 has 24 divisors (see below), whose sum is σ = 335943972. Its totient is φ = 34455744.

The previous prime is 129209117. The next prime is 129209159. The reversal of 129209130 is 31902921.

It can be written as a sum of positive squares in 2 ways, for example, as 129208689 + 441 = 11367^2 + 21^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129209094 and 129209103.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717739 + ... + 717918.

Almost surely, 2^129209130 is an apocalyptic number.

129209130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129209130 is an abundant number, since it is smaller than the sum of its proper divisors (206734842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129209130 is a wasteful number, since it uses less digits than its factorization.

129209130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435670 (or 1435667 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 129209130 is about 11367.0193982416. The cubic root of 129209130 is about 505.5503329618.

The spelling of 129209130 in words is "one hundred twenty-nine million, two hundred nine thousand, one hundred thirty".