128534635 has 4 divisors (see below), whose sum is σ = 154241568. Its totient is φ = 102827704.

The previous prime is 128534629. The next prime is 128534647. The reversal of 128534635 is 536435821.

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 128534635 - 2¹⁷ = 128403563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128534594 and 128534603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12853459 + ... + 12853468.

It is an arithmetic number, because the mean of its divisors is an integer number (38560392).

Almost surely, 2^128534635 is an apocalyptic number.

128534635 is a deficient number, since it is larger than the sum of its proper divisors (25706933).

128534635 is an equidigital number, since it uses as much as digits as its factorization.

128534635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25706932.

The product of its digits is 86400, while the sum is 37.

The square root of 128534635 is about 11337.3116301882. The cubic root of 128534635 is about 504.6691097754.

The spelling of 128534635 in words is "one hundred twenty-eight million, five hundred thirty-four thousand, six hundred thirty-five".