12509896 has 64 divisors (see below), whose sum is σ = 28224000. Its totient is φ = 5193216.

The previous prime is 12509869. The next prime is 12509911. The reversal of 12509896 is 69890521.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128920 + ... + 129016.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^12509896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12509896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14112000).

12509896 is an abundant number, since it is smaller than the sum of its proper divisors (15714104).

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

12509896 is an equidigital number, since it uses as much as digits as its factorization.

12509896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 12509896 is about 3536.9331347935. The cubic root of 12509896 is about 232.1406697433.

Subtracting 12509896 from its reverse (69890521), we obtain a square (57380625 = 7575²).

The spelling of 12509896 in words is "twelve million, five hundred nine thousand, eight hundred ninety-six".