12509536 has 24 divisors (see below), whose sum is σ = 26523504. Its totient is φ = 5773440.

The previous prime is 12509533. The next prime is 12509579. The reversal of 12509536 is 63590521.

12509536 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 = 12509498 and 12509507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509531) 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, 14620 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (1105146).

Almost surely, 2^12509536 is an apocalyptic number.

12509536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12509536 is an abundant number, since it is smaller than the sum of its proper divisors (14013968).

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

12509536 is a wasteful number, since it uses less digits than its factorization.

12509536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30094 (or 30086 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 12509536 is about 3536.8822428800. The cubic root of 12509536 is about 232.1384429344.

The spelling of 12509536 in words is "twelve million, five hundred nine thousand, five hundred thirty-six".