129528445 has 8 divisors (see below), whose sum is σ = 155521080. Its totient is φ = 103564800.

The previous prime is 129528407. The next prime is 129528461. The reversal of 129528445 is 544825921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27154521 + 102373924 = 5211^2 + 10118^2 .

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

It is not a de Polignac number, because 129528445 - 2⁷ = 129528317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129528398 and 129528407.

It is a congruent number.

It is an unprimeable number.

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, 4245 + ... + 16645.

It is an arithmetic number, because the mean of its divisors is an integer number (19440135).

Almost surely, 2^129528445 is an apocalyptic number.

It is an amenable number.

129528445 is a deficient number, since it is larger than the sum of its proper divisors (25992635).

129528445 is a wasteful number, since it uses less digits than its factorization.

129528445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14495.

The product of its digits is 115200, while the sum is 40.

The square root of 129528445 is about 11381.0564096660. The cubic root of 129528445 is about 505.9664465036.

The spelling of 129528445 in words is "one hundred twenty-nine million, five hundred twenty-eight thousand, four hundred forty-five".