129152611 has 4 divisors (see below), whose sum is σ = 147602992. Its totient is φ = 110702232.

The previous prime is 129152509. The next prime is 129152629. The reversal of 129152611 is 116251921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129152611 - 2¹¹ = 129150563 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 129152611.

It is not an unprimeable number, because it can be changed into a prime (129152651) 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, 9225180 + ... + 9225193.

It is an arithmetic number, because the mean of its divisors is an integer number (36900748).

Almost surely, 2^129152611 is an apocalyptic number.

129152611 is a deficient number, since it is larger than the sum of its proper divisors (18450381).

129152611 is an equidigital number, since it uses as much as digits as its factorization.

129152611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450380.

The product of its digits is 1080, while the sum is 28.

The square root of 129152611 is about 11364.5330304417. The cubic root of 129152611 is about 505.4766091559.

The spelling of 129152611 in words is "one hundred twenty-nine million, one hundred fifty-two thousand, six hundred eleven".