129254609 has 16 divisors (see below), whose sum is σ = 143311680. Its totient is φ = 115599360.

The previous prime is 129254581. The next prime is 129254617. The reversal of 129254609 is 906452921.

It is a cyclic number.

It is not a de Polignac number, because 129254609 - 2⁸ = 129254353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129254659) 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 15 ways as a sum of consecutive naturals, for example, 226877 + ... + 227445.

It is an arithmetic number, because the mean of its divisors is an integer number (8956980).

Almost surely, 2^129254609 is an apocalyptic number.

It is an amenable number.

129254609 is a deficient number, since it is larger than the sum of its proper divisors (14057071).

129254609 is a wasteful number, since it uses less digits than its factorization.

129254609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 129254609 is about 11369.0197026833. The cubic root of 129254609 is about 505.6096405008.

The spelling of 129254609 in words is "one hundred twenty-nine million, two hundred fifty-four thousand, six hundred nine".