129648417 has 16 divisors (see below), whose sum is σ = 181112832. Its totient is φ = 82391760.

The previous prime is 129648383. The next prime is 129648451. The reversal of 129648417 is 714846921.

It is an interprime number because it is at equal distance from previous prime (129648383) and next prime (129648451).

It is not a de Polignac number, because 129648417 - 2⁶ = 129648353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129648517) 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, 4173 + ... + 16634.

It is an arithmetic number, because the mean of its divisors is an integer number (11319552).

Almost surely, 2^129648417 is an apocalyptic number.

It is an amenable number.

129648417 is a deficient number, since it is larger than the sum of its proper divisors (51464415).

129648417 is a wasteful number, since it uses less digits than its factorization.

129648417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20908.

The product of its digits is 96768, while the sum is 42.

The square root of 129648417 is about 11386.3258779995. The cubic root of 129648417 is about 506.1226105932.

The spelling of 129648417 in words is "one hundred twenty-nine million, six hundred forty-eight thousand, four hundred seventeen".