129032955 has 24 divisors (see below), whose sum is σ = 227000592. Its totient is φ = 67788864.

The previous prime is 129032951. The next prime is 129032987. The reversal of 129032955 is 559230921.

It is a happy number.

It is not a de Polignac number, because 129032955 - 2² = 129032951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129032951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18384 + ... + 24413.

It is an arithmetic number, because the mean of its divisors is an integer number (9458358).

Almost surely, 2^129032955 is an apocalyptic number.

129032955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129032955 is a deficient number, since it is larger than the sum of its proper divisors (97967637).

129032955 is a wasteful number, since it uses less digits than its factorization.

129032955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42875 (or 42872 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 129032955 is about 11359.2673619384. The cubic root of 129032955 is about 505.3204579770.

The spelling of 129032955 in words is "one hundred twenty-nine million, thirty-two thousand, nine hundred fifty-five".