129533601 has 4 divisors (see below), whose sum is σ = 172711472. Its totient is φ = 86355732.

The previous prime is 129533581. The next prime is 129533617. The reversal of 129533601 is 106335921.

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 not a de Polignac number, because 129533601 - 2¹⁴ = 129517217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129533641) 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, 21588931 + ... + 21588936.

It is an arithmetic number, because the mean of its divisors is an integer number (43177868).

Almost surely, 2^129533601 is an apocalyptic number.

It is an amenable number.

129533601 is a deficient number, since it is larger than the sum of its proper divisors (43177871).

129533601 is an equidigital number, since it uses as much as digits as its factorization.

129533601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43177870.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 129533601 is about 11381.2829241698. The cubic root of 129533601 is about 505.9731599026.

The spelling of 129533601 in words is "one hundred twenty-nine million, five hundred thirty-three thousand, six hundred one".