128706551 has 8 divisors (see below), whose sum is σ = 141371520. Its totient is φ = 116630712.

The previous prime is 128706527. The next prime is 128706581. The reversal of 128706551 is 155607821.

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 128706551 - 2²² = 124512247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128706521) 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, 146825 + ... + 147698.

It is an arithmetic number, because the mean of its divisors is an integer number (17671440).

Almost surely, 2^128706551 is an apocalyptic number.

128706551 is a deficient number, since it is larger than the sum of its proper divisors (12664969).

128706551 is a wasteful number, since it uses less digits than its factorization.

128706551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294565.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 128706551 is about 11344.8909646589. The cubic root of 128706551 is about 504.8940090600.

The spelling of 128706551 in words is "one hundred twenty-eight million, seven hundred six thousand, five hundred fifty-one".