128602 has 4 divisors (see below), whose sum is σ = 192906. Its totient is φ = 64300.

The previous prime is 128599. The next prime is 128603. The reversal of 128602 is 206821.

It is a happy number.

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., 116281 + 12321 = 341^2 + 111^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 128602.

It is not an unprimeable number, because it can be changed into a prime (128603) 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, 32149 + ... + 32152.

2¹²⁸⁶⁰² is an apocalyptic number.

128602 is a deficient number, since it is larger than the sum of its proper divisors (64304).

128602 is an equidigital number, since it uses as much as digits as its factorization.

128602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64303.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 128602 is about 358.6112100869. The cubic root of 128602 is about 50.4757260068.

The spelling of 128602 in words is "one hundred twenty-eight thousand, six hundred two".