128469 has 16 divisors (see below), whose sum is σ = 198720. Its totient is φ = 72960.

The previous prime is 128467. The next prime is 128473. The reversal of 128469 is 964821.

It is not a de Polignac number, because 128469 - 2¹ = 128467 is a prime.

It is a super-2 number, since 2×128469² = 33008567922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (12420).

2¹²⁸⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

128469 is a deficient number, since it is larger than the sum of its proper divisors (70251).

128469 is a wasteful number, since it uses less digits than its factorization.

128469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 3456, while the sum is 30.

The square root of 128469 is about 358.4257245232. The cubic root of 128469 is about 50.4583193641.

The spelling of 128469 in words is "one hundred twenty-eight thousand, four hundred sixty-nine".