128263 has 4 divisors (see below), whose sum is σ = 131040. Its totient is φ = 125488.

The previous prime is 128257. The next prime is 128273. The reversal of 128263 is 362821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362821 = 223 ⋅1627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128203) 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, 1318 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2¹²⁸²⁶³ is an apocalyptic number.

128263 is a deficient number, since it is larger than the sum of its proper divisors (2777).

128263 is an equidigital number, since it uses as much as digits as its factorization.

128263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776.

The product of its digits is 576, while the sum is 22.

The square root of 128263 is about 358.1382414655. The cubic root of 128263 is about 50.4313349696.

The spelling of 128263 in words is "one hundred twenty-eight thousand, two hundred sixty-three".