129028417 has 24 divisors (see below), whose sum is σ = 156148992. Its totient is φ = 106192800.

The previous prime is 129028369. The next prime is 129028421. The reversal of 129028417 is 714820921.

It is not a de Polignac number, because 129028417 - 2¹¹ = 129026369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129028717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262542 + ... + 263032.

It is an arithmetic number, because the mean of its divisors is an integer number (6506208).

Almost surely, 2^129028417 is an apocalyptic number.

It is an amenable number.

129028417 is a deficient number, since it is larger than the sum of its proper divisors (27120575).

129028417 is a wasteful number, since it uses less digits than its factorization.

129028417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 129028417 is about 11359.0676113843. The cubic root of 129028417 is about 505.3145339836.

The spelling of 129028417 in words is "one hundred twenty-nine million, twenty-eight thousand, four hundred seventeen".