12523616 has 60 divisors (see below), whose sum is σ = 28939932. Its totient is φ = 5334336.

The previous prime is 12523613. The next prime is 12523627. The reversal of 12523616 is 61632521.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76751 + ... + 76913.

Almost surely, 2^12523616 is an apocalyptic number.

12523616 is a gapful number since it is divisible by the number (16) 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 12523616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14469966).

12523616 is an abundant number, since it is smaller than the sum of its proper divisors (16416316).

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

12523616 is an frugal number, since it uses more digits than its factorization.

12523616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 172 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 12523616 is about 3538.8721367125. The cubic root of 12523616 is about 232.2255040842.

The spelling of 12523616 in words is "twelve million, five hundred twenty-three thousand, six hundred sixteen".