129056651 has 4 divisors (see below), whose sum is σ = 129408672. Its totient is φ = 128704632.

The previous prime is 129056647. The next prime is 129056677. The reversal of 129056651 is 156650921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129056651 - 2² = 129056647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129056621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 175460 + ... + 176193.

It is an arithmetic number, because the mean of its divisors is an integer number (32352168).

Almost surely, 2^129056651 is an apocalyptic number.

129056651 is a deficient number, since it is larger than the sum of its proper divisors (352021).

129056651 is an equidigital number, since it uses as much as digits as its factorization.

129056651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352020.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 129056651 is about 11360.3103390708. The cubic root of 129056651 is about 505.3513889399.

The spelling of 129056651 in words is "one hundred twenty-nine million, fifty-six thousand, six hundred fifty-one".