129117030 has 32 divisors (see below), whose sum is σ = 354150144. Its totient is φ = 29512416.

The previous prime is 129117011. The next prime is 129117031. The reversal of 129117030 is 30711921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129117031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307212 + ... + 307631.

It is an arithmetic number, because the mean of its divisors is an integer number (11067192).

Almost surely, 2^129117030 is an apocalyptic number.

129117030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129117030 is an abundant number, since it is smaller than the sum of its proper divisors (225033114).

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

129117030 is a wasteful number, since it uses less digits than its factorization.

129117030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614860.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 129117030 is about 11362.9674821325. The cubic root of 129117030 is about 505.4301860007.

Adding to 129117030 its reverse (30711921), we get a palindrome (159828951).

The spelling of 129117030 in words is "one hundred twenty-nine million, one hundred seventeen thousand, thirty".