121433856 has 144 divisors (see below), whose sum is σ = 349671168. Its totient is φ = 37273600.

The previous prime is 121433843. The next prime is 121433857. The reversal of 121433856 is 658334121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121433857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926911 + ... + 927041.

It is an arithmetic number, because the mean of its divisors is an integer number (2428272).

Almost surely, 2^121433856 is an apocalyptic number.

121433856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121433856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174835584).

121433856 is an abundant number, since it is smaller than the sum of its proper divisors (228237312).

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

121433856 is a wasteful number, since it uses less digits than its factorization.

121433856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 224 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 121433856 is about 11019.7030812994. The cubic root of 121433856 is about 495.1991933752.

Adding to 121433856 its reverse (658334121), we get a palindrome (779767977).

The spelling of 121433856 in words is "one hundred twenty-one million, four hundred thirty-three thousand, eight hundred fifty-six".