128692 has 6 divisors (see below), whose sum is σ = 225218. Its totient is φ = 64344.

The previous prime is 128683. The next prime is 128693. The reversal of 128692 is 296821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 104976 + 23716 = 324^2 + 154^2 .

It is a d-powerful number, because it can be written as 1 + 2² + 6 + 8⁴ + 9⁵ + 2¹⁶ .

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128692.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16083 + ... + 16090.

2¹²⁸⁶⁹² is an apocalyptic number.

It is an amenable number.

128692 is a deficient number, since it is larger than the sum of its proper divisors (96526).

128692 is a wasteful number, since it uses less digits than its factorization.

128692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32177 (or 32175 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 128692 is about 358.7366722263. The cubic root of 128692 is about 50.4874981306.

It can be divided in two parts, 1286 and 92, that added together give a triangular number (1378 = T₅₂).

The spelling of 128692 in words is "one hundred twenty-eight thousand, six hundred ninety-two".