129415897 has 16 divisors (see below), whose sum is σ = 147112000. Its totient is φ = 112860864.

The previous prime is 129415861. The next prime is 129415901. The reversal of 129415897 is 798514921.

It is a cyclic number.

It is not a de Polignac number, because 129415897 - 2¹⁵ = 129383129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129415697) 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, 174754 + ... + 175492.

It is an arithmetic number, because the mean of its divisors is an integer number (9194500).

Almost surely, 2^129415897 is an apocalyptic number.

It is an amenable number.

129415897 is a deficient number, since it is larger than the sum of its proper divisors (17696103).

129415897 is a wasteful number, since it uses less digits than its factorization.

129415897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480.

The product of its digits is 181440, while the sum is 46.

The square root of 129415897 is about 11376.1108029062. The cubic root of 129415897 is about 505.8198583340.

The spelling of 129415897 in words is "one hundred twenty-nine million, four hundred fifteen thousand, eight hundred ninety-seven".