923521 has 5 divisors (see below), whose sum is σ = 954305.
Its totient is φ = 893730.
The previous prime is 923513. The next prime is 923539. The reversal of 923521 is 125329.
It can be divided in two parts, 923 and 521, that added together give a square (1444 = 382).
The square root of 923521 is 961.
It is a perfect power (a square, a biquadrate), and thus also a powerful number.
It is not a de Polignac number, because 923521 - 23 = 923513 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 923492 and 923501.
It is not an unprimeable number, because it can be changed into a prime (923501) by changing a digit.
It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 29776 + ... + 29806.
It is an arithmetic number, because the mean of its divisors is an integer number (190861).
923521 is a Friedman number, since it can be written as (32-2+1)^(9-5), using all its digits and the basic arithmetic operations.
2923521 is an apocalyptic number.
923521 is the 961-st square number.
923521 is the 481-st centered octagonal number.
It is an amenable number.
923521 is a deficient number, since it is larger than the sum of its proper divisors (30784).
923521 is an frugal number, since it uses more digits than its factorization.
923521 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 124 (or 31 counting only the distinct ones).
The product of its digits is 540, while the sum is 22.
The cubic root of 923521 is about 97.3828002241.
The spelling of 923521 in words is "nine hundred twenty-three thousand, five hundred twenty-one".