128581283 has 8 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 127438528.

The previous prime is 128581261. The next prime is 128581291. The reversal of 128581283 is 382185821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128581283 - 2¹⁰ = 128580259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128581883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54533 + ... + 56841.

It is an arithmetic number, because the mean of its divisors is an integer number (16216200).

Almost surely, 2^128581283 is an apocalyptic number.

128581283 is a deficient number, since it is larger than the sum of its proper divisors (1148317).

128581283 is a wasteful number, since it uses less digits than its factorization.

128581283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781.

The product of its digits is 30720, while the sum is 38.

The square root of 128581283 is about 11339.3687214060. The cubic root of 128581283 is about 504.7301541708.

It can be divided in two parts, 12858 and 1283, that added together give a palindrome (14141).

The spelling of 128581283 in words is "one hundred twenty-eight million, five hundred eighty-one thousand, two hundred eighty-three".