128069 has 4 divisors (see below), whose sum is σ = 129696. Its totient is φ = 126444.

The previous prime is 128053. The next prime is 128099. The reversal of 128069 is 960821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960821 = 47 ⋅20443.

It is a cyclic number.

It is not a de Polignac number, because 128069 - 2⁴ = 128053 is a prime.

It is a super-2 number, since 2×128069² = 32803337522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689 + ... + 854.

It is an arithmetic number, because the mean of its divisors is an integer number (32424).

2¹²⁸⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

128069 is a deficient number, since it is larger than the sum of its proper divisors (1627).

128069 is an equidigital number, since it uses as much as digits as its factorization.

128069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 128069 is about 357.8672938395. The cubic root of 128069 is about 50.4058960516.

The spelling of 128069 in words is "one hundred twenty-eight thousand, sixty-nine".