121432 has 16 divisors (see below), whose sum is σ = 233640.
Its totient is φ = 59136.
The previous prime is 121421. The next prime is 121439. The reversal of 121432 is 234121.
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121439) by changing a digit.
121432 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 520.
2121432 is an apocalyptic number.
It is an amenable number.
121432 is a deficient number, since it is larger than the sum of its proper divisors (112208).
121432 is a wasteful number, since it uses less digits than its factorization.
121432 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 402 (or 398 counting only the distinct ones).
The product of its digits is 48, while the sum is 13.
The square root of 121432 is about 348.4709457042.
The cubic root of 121432 is about 49.5196670481.
Adding to 121432 its reverse (234121), we get a palindrome (355553).
It can be divided in two parts, 12 and 1432, that added together give a square (1444 = 382).
The spelling of 121432 in words is "one hundred twenty-one thousand, four hundred thirty-two".