128265812 has 12 divisors (see below), whose sum is σ = 224648340. Its totient is φ = 64080576.

The previous prime is 128265763. The next prime is 128265829. The reversal of 128265812 is 218562821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 89378116 = 6236^2 + 9454^2 .

It is a congruent number.

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, 7283 + ... + 17594.

It is an arithmetic number, because the mean of its divisors is an integer number (18720695).

Almost surely, 2^128265812 is an apocalyptic number.

It is an amenable number.

128265812 is a deficient number, since it is larger than the sum of its proper divisors (96382528).

128265812 is a wasteful number, since it uses less digits than its factorization.

128265812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26170 (or 26168 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 128265812 is about 11325.4497482440. The cubic root of 128265812 is about 504.3170351409.

The spelling of 128265812 in words is "one hundred twenty-eight million, two hundred sixty-five thousand, eight hundred twelve".