52621 has 4 divisors (see below), whose sum is σ = 53244.
Its totient is φ = 52000.
The previous prime is 52609. The next prime is 52627. The reversal of 52621 is 12625.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 35721 + 16900 = 189^2 + 130^2
It is a cyclic number.
It is not a de Polignac number, because 52621 - 215 = 19853 is a prime.
It is an Ulam number.
It is a Duffinian number.
52621 is a lucky number.
It is a junction number, because it is equal to n+sod(n) for n = 52595 and 52604.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (52627) 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, 160 + ... + 361.
It is an arithmetic number, because the mean of its divisors is an integer number (13311).
252621 is an apocalyptic number.
It is an amenable number.
52621 is a deficient number, since it is larger than the sum of its proper divisors (623).
52621 is a wasteful number, since it uses less digits than its factorization.
52621 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 622.
The product of its digits is 120, while the sum is 16.
The square root of 52621 is about 229.3926764306.
The cubic root of 52621 is about 37.4731066438.
The spelling of 52621 in words is "fifty-two thousand, six hundred twenty-one".