53121 has 4 divisors (see below), whose sum is σ = 70832.
Its totient is φ = 35412.
The previous prime is 53117. The next prime is 53129. The reversal of 53121 is 12135.
53121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 53121 - 22 = 53117 is a prime.
It is a D-number.
It is a Duffinian number.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 53097 and 53106.
It is not an unprimeable number, because it can be changed into a prime (53129) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8851 + ... + 8856.
It is an arithmetic number, because the mean of its divisors is an integer number (17708).
253121 is an apocalyptic number.
It is an amenable number.
53121 is a deficient number, since it is larger than the sum of its proper divisors (17711).
53121 is a wasteful number, since it uses less digits than its factorization.
53121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 17710.
The product of its digits is 30, while the sum is 12.
The square root of 53121 is about 230.4799340507.
The cubic root of 53121 is about 37.5914213868.
Adding to 53121 its reverse (12135), we get a palindrome (65256).
The spelling of 53121 in words is "fifty-three thousand, one hundred twenty-one".