128419 has 4 divisors (see below), whose sum is σ = 130896. Its totient is φ = 125944.

The previous prime is 128413. The next prime is 128431. The reversal of 128419 is 914821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 914821 = 17 ⋅53813.

It is a cyclic number.

It is not a de Polignac number, because 128419 - 2³ = 128411 is a prime.

It is a super-2 number, since 2×128419² = 32982879122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128393 and 128402.

It is not an unprimeable number, because it can be changed into a prime (128411) 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 in 3 ways as a sum of consecutive naturals, for example, 1159 + ... + 1264.

It is an arithmetic number, because the mean of its divisors is an integer number (32724).

2¹²⁸⁴¹⁹ is an apocalyptic number.

128419 is a deficient number, since it is larger than the sum of its proper divisors (2477).

128419 is an equidigital number, since it uses as much as digits as its factorization.

128419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476.

The product of its digits is 576, while the sum is 25.

The square root of 128419 is about 358.3559682774. The cubic root of 128419 is about 50.4517724064.

The spelling of 128419 in words is "one hundred twenty-eight thousand, four hundred nineteen".