128125206 has 48 divisors (see below), whose sum is σ = 312975600. Its totient is φ = 38823840.

The previous prime is 128125187. The next prime is 128125213. The reversal of 128125206 is 602521821.

It is a happy number.

128125206 is a `hidden beast` number, since 128 + 12 + 520 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 128125206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3271 + ... + 16338.

It is an arithmetic number, because the mean of its divisors is an integer number (6520325).

Almost surely, 2^128125206 is an apocalyptic number.

128125206 is an abundant number, since it is smaller than the sum of its proper divisors (184850394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128125206 is a wasteful number, since it uses less digits than its factorization.

128125206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19642 (or 19625 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 128125206 is about 11319.2405222259. The cubic root of 128125206 is about 504.1326889866.

It can be divided in two parts, 12 and 8125206, that added together give a palindrome (8125218).

The spelling of 128125206 in words is "one hundred twenty-eight million, one hundred twenty-five thousand, two hundred six".