121828 has 24 divisors (see below), whose sum is σ = 257600. Its totient is φ = 49248.

The previous prime is 121789. The next prime is 121843. The reversal of 121828 is 828121.

It is a junction number, because it is equal to n+sod(n) for n = 121799 and 121808.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 418 + ... + 646.

2¹²¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128800).

121828 is an abundant number, since it is smaller than the sum of its proper divisors (135772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121828 is a wasteful number, since it uses less digits than its factorization.

121828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 121828 is about 349.0386798050. The cubic root of 121828 is about 49.5734379110.

Adding to 121828 its reverse (828121), we get a palindrome (949949).

It can be divided in two parts, 121 and 828, that added together give a palindrome (949).

The spelling of 121828 in words is "one hundred twenty-one thousand, eight hundred twenty-eight".