870256129 has 16 divisors (see below), whose sum is σ = 962824320. Its totient is φ = 782383360.

The previous prime is 870256117. The next prime is 870256139. The reversal of 870256129 is 921652078.

870256129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870256129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 870256091 and 870256100.

It is not an unprimeable number, because it can be changed into a prime (870256139) 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, 479634 + ... + 481444.

It is an arithmetic number, because the mean of its divisors is an integer number (60176520).

Almost surely, 2^870256129 is an apocalyptic number.

It is an amenable number.

870256129 is a deficient number, since it is larger than the sum of its proper divisors (92568191).

870256129 is a wasteful number, since it uses less digits than its factorization.

870256129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 870256129 is about 29500.1038811730. The cubic root of 870256129 is about 954.7339441418.

The spelling of 870256129 in words is "eight hundred seventy million, two hundred fifty-six thousand, one hundred twenty-nine".