129036434 has 8 divisors (see below), whose sum is σ = 193605708. Its totient is φ = 64501200.

The previous prime is 129036433. The next prime is 129036437. The reversal of 129036434 is 434630921.

It can be written as a sum of positive squares in 2 ways, for example, as 99301225 + 29735209 = 9965^2 + 5453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 129036434.

It is not an unprimeable number, because it can be changed into a prime (129036431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5744 + ... + 17060.

Almost surely, 2^129036434 is an apocalyptic number.

129036434 is a deficient number, since it is larger than the sum of its proper divisors (64569274).

129036434 is a wasteful number, since it uses less digits than its factorization.

129036434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17020.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 129036434 is about 11359.4204957823. The cubic root of 129036434 is about 505.3249994371.

The spelling of 129036434 in words is "one hundred twenty-nine million, thirty-six thousand, four hundred thirty-four".