129257011 has 16 divisors (see below), whose sum is σ = 147051520. Its totient is φ = 112764960.

The previous prime is 129256999. The next prime is 129257017. The reversal of 129257011 is 110752921.

It is a cyclic number.

It is not a de Polignac number, because 129257011 - 2¹⁵ = 129224243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129257017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13600 + ... + 21058.

It is an arithmetic number, because the mean of its divisors is an integer number (9190720).

Almost surely, 2^129257011 is an apocalyptic number.

129257011 is a deficient number, since it is larger than the sum of its proper divisors (17794509).

129257011 is a wasteful number, since it uses less digits than its factorization.

129257011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 129257011 is about 11369.1253401482. The cubic root of 129257011 is about 505.6127724764.

The spelling of 129257011 in words is "one hundred twenty-nine million, two hundred fifty-seven thousand, eleven".