129245945 has 8 divisors (see below), whose sum is σ = 156601536. Its totient is φ = 102392496.

The previous prime is 129245939. The next prime is 129245971. The reversal of 129245945 is 549542921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129245945 - 2⁴ = 129245929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124967 + ... + 125996.

It is an arithmetic number, because the mean of its divisors is an integer number (19575192).

Almost surely, 2^129245945 is an apocalyptic number.

It is an amenable number.

129245945 is a deficient number, since it is larger than the sum of its proper divisors (27355591).

129245945 is a wasteful number, since it uses less digits than its factorization.

129245945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251071.

The product of its digits is 129600, while the sum is 41.

The square root of 129245945 is about 11368.6386608072. The cubic root of 129245945 is about 505.5983431608.

The spelling of 129245945 in words is "one hundred twenty-nine million, two hundred forty-five thousand, nine hundred forty-five".