128463 has 4 divisors (see below), whose sum is σ = 171288. Its totient is φ = 85640.

The previous prime is 128461. The next prime is 128467. The reversal of 128463 is 364821.

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: 364821 = 3 ⋅121607.

It is a cyclic number.

It is not a de Polignac number, because 128463 - 2¹ = 128461 is a prime.

It is an Ulam number.

It is a D-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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21408 + ... + 21413.

It is an arithmetic number, because the mean of its divisors is an integer number (42822).

2¹²⁸⁴⁶³ is an apocalyptic number.

128463 is a deficient number, since it is larger than the sum of its proper divisors (42825).

128463 is an equidigital number, since it uses as much as digits as its factorization.

128463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42824.

The product of its digits is 1152, while the sum is 24.

The square root of 128463 is about 358.4173544905. The cubic root of 128463 is about 50.4575338189.

The spelling of 128463 in words is "one hundred twenty-eight thousand, four hundred sixty-three".