121355432 has 64 divisors (see below), whose sum is σ = 263390400. Its totient is φ = 51840000.

The previous prime is 121355431. The next prime is 121355447. The reversal of 121355432 is 234553121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121355431) 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, 302432 + ... + 302832.

It is an arithmetic number, because the mean of its divisors is an integer number (4115475).

Almost surely, 2^121355432 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 121355432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131695200).

121355432 is an abundant number, since it is smaller than the sum of its proper divisors (142034968).

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

121355432 is a wasteful number, since it uses less digits than its factorization.

121355432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 614 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 121355432 is about 11016.1441530147. The cubic root of 121355432 is about 495.0925677986.

It can be divided in two parts, 121 and 355432, that added together give a palindrome (355553).

The spelling of 121355432 in words is "one hundred twenty-one million, three hundred fifty-five thousand, four hundred thirty-two".