129056131 has 8 divisors (see below), whose sum is σ = 133351424. Its totient is φ = 124769160.

The previous prime is 129056107. The next prime is 129056143. The reversal of 129056131 is 131650921.

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 129056131 - 2⁵ = 129056099 is a prime.

It is a super-2 number, since 2×129056131² = 33310969897378322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129056131.

It is not an unprimeable number, because it can be changed into a prime (129056101) 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, 52966 + ... + 55348.

It is an arithmetic number, because the mean of its divisors is an integer number (16668928).

Almost surely, 2^129056131 is an apocalyptic number.

129056131 is a deficient number, since it is larger than the sum of its proper divisors (4295293).

129056131 is a wasteful number, since it uses less digits than its factorization.

129056131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 129056131 is about 11360.2874523491. The cubic root of 129056131 is about 505.3507102120.

The spelling of 129056131 in words is "one hundred twenty-nine million, fifty-six thousand, one hundred thirty-one".