129471321 has 16 divisors (see below), whose sum is σ = 197458304. Its totient is φ = 73920384.

The previous prime is 129471313. The next prime is 129471367. The reversal of 129471321 is 123174921.

It is not a de Polignac number, because 129471321 - 2³ = 129471313 is a prime.

It is a super-2 number, since 2×129471321² = 33525645922970082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129471521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35055 + ... + 38571.

It is an arithmetic number, because the mean of its divisors is an integer number (12341144).

Almost surely, 2^129471321 is an apocalyptic number.

It is an amenable number.

129471321 is a deficient number, since it is larger than the sum of its proper divisors (67986983).

129471321 is a wasteful number, since it uses less digits than its factorization.

129471321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280.

The product of its digits is 3024, while the sum is 30.

The square root of 129471321 is about 11378.5465240513. The cubic root of 129471321 is about 505.8920559526.

The spelling of 129471321 in words is "one hundred twenty-nine million, four hundred seventy-one thousand, three hundred twenty-one".