129152533 has 4 divisors (see below), whose sum is σ = 132643180. Its totient is φ = 125661888.

The previous prime is 129152509. The next prime is 129152629. The reversal of 129152533 is 335251921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57123364 + 72029169 = 7558^2 + 8487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129152533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129152495 and 129152504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129852533) 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, 1745268 + ... + 1745341.

It is an arithmetic number, because the mean of its divisors is an integer number (33160795).

Almost surely, 2^129152533 is an apocalyptic number.

It is an amenable number.

129152533 is a deficient number, since it is larger than the sum of its proper divisors (3490647).

129152533 is an equidigital number, since it uses as much as digits as its factorization.

129152533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490646.

The product of its digits is 8100, while the sum is 31.

The square root of 129152533 is about 11364.5295987120. The cubic root of 129152533 is about 505.4765073973.

It can be divided in two parts, 1291 and 52533, that added together give a square (53824 = 232²).

The spelling of 129152533 in words is "one hundred twenty-nine million, one hundred fifty-two thousand, five hundred thirty-three".