129806841 has 32 divisors (see below), whose sum is σ = 190364800. Its totient is φ = 78382080.

The previous prime is 129806839. The next prime is 129806851. The reversal of 129806841 is 148608921.

It is not a de Polignac number, because 129806841 - 2¹ = 129806839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129806841.

It is not an unprimeable number, because it can be changed into a prime (129806851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128145 + ... + 129153.

It is an arithmetic number, because the mean of its divisors is an integer number (5948900).

Almost surely, 2^129806841 is an apocalyptic number.

It is an amenable number.

129806841 is a deficient number, since it is larger than the sum of its proper divisors (60557959).

129806841 is a wasteful number, since it uses less digits than its factorization.

129806841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 129806841 is about 11393.2805196747. The cubic root of 129806841 is about 506.3286790075.

The spelling of 129806841 in words is "one hundred twenty-nine million, eight hundred six thousand, eight hundred forty-one".