12520 has 16 divisors (see below), whose sum is σ = 28260.
Its totient is φ = 4992.
The previous prime is 12517. The next prime is 12527. The reversal of 12520 is 2521.
It can be written as a sum of positive squares in 2 ways, for example, as 10404 + 2116 = 102^2 + 46^2
It is a Harshad number since it is a multiple of its sum of digits (10).
It is a junction number, because it is equal to n+sod(n) for n = 12497 and 12506.
It is not an unprimeable number, because it can be changed into a prime (12527) 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, 117 + ... + 196.
212520 is an apocalyptic number.
12520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
12520 is an abundant number, since it is smaller than the sum of its proper divisors (15740).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14130).
12520 is a wasteful number, since it uses less digits than its factorization.
12520 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 324 (or 320 counting only the distinct ones).
The product of its (nonzero) digits is 20, while the sum is 10.
The square root of 12520 is about 111.8928058456.
The cubic root of 12520 is about 23.2203151428.
12520 divided by its product of nonzero digits (20) gives a palindrome (626).
Subtracting from 12520 its reverse (2521), we obtain a palindrome (9999).
It can be divided in two parts, 125 and 20, that multiplied together give a square (2500 = 502).
The spelling of 12520 in words is "twelve thousand, five hundred twenty".