129545101 has 4 divisors (see below), whose sum is σ = 148051552. Its totient is φ = 111038652.

The previous prime is 129545099. The next prime is 129545137. The reversal of 129545101 is 101545921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129545101 - 2¹ = 129545099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129545101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129545191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9253215 + ... + 9253228.

It is an arithmetic number, because the mean of its divisors is an integer number (37012888).

Almost surely, 2^129545101 is an apocalyptic number.

It is an amenable number.

129545101 is a deficient number, since it is larger than the sum of its proper divisors (18506451).

129545101 is an equidigital number, since it uses as much as digits as its factorization.

129545101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18506450.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 129545101 is about 11381.7881284093. The cubic root of 129545101 is about 505.9881329009.

The spelling of 129545101 in words is "one hundred twenty-nine million, five hundred forty-five thousand, one hundred one".