129945192 has 32 divisors (see below), whose sum is σ = 349853280. Its totient is φ = 39983040.

The previous prime is 129945191. The next prime is 129945197. The reversal of 129945192 is 291549921.

It is not an unprimeable number, because it can be changed into a prime (129945191) 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 7 ways as a sum of consecutive naturals, for example, 207934 + ... + 208557.

It is an arithmetic number, because the mean of its divisors is an integer number (10932915).

Almost surely, 2^129945192 is an apocalyptic number.

129945192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129945192 is an abundant number, since it is smaller than the sum of its proper divisors (219908088).

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

129945192 is a wasteful number, since it uses less digits than its factorization.

129945192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416513 (or 416509 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 129945192 is about 11399.3505078140. The cubic root of 129945192 is about 506.5085005689.

The spelling of 129945192 in words is "one hundred twenty-nine million, nine hundred forty-five thousand, one hundred ninety-two".