129576945 has 8 divisors (see below), whose sum is σ = 207323136. Its totient is φ = 69107696.

The previous prime is 129576913. The next prime is 129576949. The reversal of 129576945 is 549675921.

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 129576945 - 2⁵ = 129576913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129576894 and 129576903.

It is not an unprimeable number, because it can be changed into a prime (129576949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4319217 + ... + 4319246.

It is an arithmetic number, because the mean of its divisors is an integer number (25915392).

Almost surely, 2^129576945 is an apocalyptic number.

129576945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129576945 is a deficient number, since it is larger than the sum of its proper divisors (77746191).

129576945 is an equidigital number, since it uses as much as digits as its factorization.

129576945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638471.

The product of its digits is 680400, while the sum is 48.

The square root of 129576945 is about 11383.1869439099. The cubic root of 129576945 is about 506.0295891606.

The spelling of 129576945 in words is "one hundred twenty-nine million, five hundred seventy-six thousand, nine hundred forty-five".