12509115 has 16 divisors (see below), whose sum is σ = 20061216. Its totient is φ = 6656000.

The previous prime is 12509099. The next prime is 12509117. The reversal of 12509115 is 51190521.

It is not a de Polignac number, because 12509115 - 2⁴ = 12509099 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12509117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8965 + ... + 10265.

It is an arithmetic number, because the mean of its divisors is an integer number (1253826).

Almost surely, 2^12509115 is an apocalyptic number.

12509115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12509115 is a deficient number, since it is larger than the sum of its proper divisors (7552101).

12509115 is a wasteful number, since it uses less digits than its factorization.

12509115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 12509115 is about 3536.8227266856. The cubic root of 12509115 is about 232.1358387509.

Adding to 12509115 its reverse (51190521), we get a palindrome (63699636).

The spelling of 12509115 in words is "twelve million, five hundred nine thousand, one hundred fifteen".