12651515 has 8 divisors (see below), whose sum is σ = 15237168. Its totient is φ = 10084320.

The previous prime is 12651491. The next prime is 12651517. The reversal of 12651515 is 51515621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12651515 - 2¹² = 12647419 is a prime.

It is a Duffinian number.

12651515 is a modest number, since divided by 1515 gives 1265 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12651517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3056 + ... + 5885.

It is an arithmetic number, because the mean of its divisors is an integer number (1904646).

Almost surely, 2^12651515 is an apocalyptic number.

12651515 is a deficient number, since it is larger than the sum of its proper divisors (2585653).

12651515 is an equidigital number, since it uses as much as digits as its factorization.

12651515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9229.

The product of its digits is 1500, while the sum is 26.

The square root of 12651515 is about 3556.8968216691. The cubic root of 12651515 is about 233.0133721073.

The spelling of 12651515 in words is "twelve million, six hundred fifty-one thousand, five hundred fifteen".