129928585 has 8 divisors (see below), whose sum is σ = 159540480. Its totient is φ = 101525424.

The previous prime is 129928583. The next prime is 129928607. The reversal of 129928585 is 585829921.

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 129928585 - 2¹ = 129928583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129928583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301945 + ... + 302374.

It is an arithmetic number, because the mean of its divisors is an integer number (19942560).

Almost surely, 2^129928585 is an apocalyptic number.

It is an amenable number.

129928585 is a deficient number, since it is larger than the sum of its proper divisors (29611895).

129928585 is an equidigital number, since it uses as much as digits as its factorization.

129928585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604367.

The product of its digits is 518400, while the sum is 49.

The square root of 129928585 is about 11398.6220658464. The cubic root of 129928585 is about 506.4869223817.

The spelling of 129928585 in words is "one hundred twenty-nine million, nine hundred twenty-eight thousand, five hundred eighty-five".