129072235 has 8 divisors (see below), whose sum is σ = 157512240. Its totient is φ = 101507424.

The previous prime is 129072227. The next prime is 129072239. The reversal of 129072235 is 532270921.

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

It is a cyclic number.

It is not a de Polignac number, because 129072235 - 2³ = 129072227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129072197 and 129072206.

It is not an unprimeable number, because it can be changed into a prime (129072239) 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 7 ways as a sum of consecutive naturals, for example, 218472 + ... + 219061.

It is an arithmetic number, because the mean of its divisors is an integer number (19689030).

Almost surely, 2^129072235 is an apocalyptic number.

129072235 is a deficient number, since it is larger than the sum of its proper divisors (28440005).

129072235 is an equidigital number, since it uses as much as digits as its factorization.

129072235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437597.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 129072235 is about 11360.9962151213. The cubic root of 129072235 is about 505.3717290490.

The spelling of 129072235 in words is "one hundred twenty-nine million, seventy-two thousand, two hundred thirty-five".