128249 has 8 divisors (see below), whose sum is σ = 142560. Its totient is φ = 114400.

The previous prime is 128239. The next prime is 128257. The reversal of 128249 is 942821.

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

It is not a de Polignac number, because 128249 - 2¹² = 124153 is a prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128239) 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, 914 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (17820).

2¹²⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

128249 is a deficient number, since it is larger than the sum of its proper divisors (14311).

128249 is a wasteful number, since it uses less digits than its factorization.

128249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its digits is 1152, while the sum is 26.

The square root of 128249 is about 358.1186954070. The cubic root of 128249 is about 50.4295000305.

It can be divided in two parts, 1282 and 49, that added together give a palindrome (1331).

The spelling of 128249 in words is "one hundred twenty-eight thousand, two hundred forty-nine".