12509472 has 24 divisors (see below), whose sum is σ = 32837616. Its totient is φ = 4169792.

The previous prime is 12509437. The next prime is 12509479. The reversal of 12509472 is 27490521.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (12509479) 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 3 ways as a sum of consecutive naturals, for example, 65058 + ... + 65249.

It is an arithmetic number, because the mean of its divisors is an integer number (1368234).

Almost surely, 2^12509472 is an apocalyptic number.

12509472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12509472 is an abundant number, since it is smaller than the sum of its proper divisors (20328144).

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

12509472 is a wasteful number, since it uses less digits than its factorization.

12509472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130320 (or 130312 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12509472 is about 3536.8731953521. The cubic root of 12509472 is about 232.1380470528.

Adding to 12509472 its reverse (27490521), we get a palindrome (39999993).

The spelling of 12509472 in words is "twelve million, five hundred nine thousand, four hundred seventy-two".