12103520 has 144 divisors (see below), whose sum is σ = 35117712. Its totient is φ = 3886080.

The previous prime is 12103517. The next prime is 12103529. The reversal of 12103520 is 2530121.

It is a happy number.

12103520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12103495 and 12103504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 526229 + ... + 526251.

It is an arithmetic number, because the mean of its divisors is an integer number (243873).

Almost surely, 2^12103520 is an apocalyptic number.

12103520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12103520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17558856).

12103520 is an abundant number, since it is smaller than the sum of its proper divisors (23014192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12103520 is a wasteful number, since it uses less digits than its factorization.

12103520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12103520 is about 3479.0113538188. The cubic root of 12103520 is about 229.5993023244.

Adding to 12103520 its reverse (2530121), we get a palindrome (14633641).

The spelling of 12103520 in words is "twelve million, one hundred three thousand, five hundred twenty".