128111602 has 4 divisors (see below), whose sum is σ = 192167406. Its totient is φ = 64055800.

The previous prime is 128111591. The next prime is 128111611. The reversal of 128111602 is 206111821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 107308881 + 20802721 = 10359^2 + 4561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32027899 + ... + 32027902.

Almost surely, 2^128111602 is an apocalyptic number.

128111602 is a deficient number, since it is larger than the sum of its proper divisors (64055804).

128111602 is an equidigital number, since it uses as much as digits as its factorization.

128111602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64055803.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 128111602 is about 11318.6395825647. The cubic root of 128111602 is about 504.1148458573.

The spelling of 128111602 in words is "one hundred twenty-eight million, one hundred eleven thousand, six hundred two".